/* ========================================================================
   Letter Radius - styles.css
   Premium handwritten mailer marketing site
   ======================================================================== */

/* --- Custom Properties --- */
:root {
    --primary: #0f2b46;
    --primary-light: #1a3a5c;
    --accent: #d4a574;
    --accent-hover: #c4935f;
    --text: #1a2332;
    --text-light: #5a6a7a;
    --bg: #f9f7f4;
    --bg-alt: #f3f0eb;
    --bg-dark: #0f2b46;
    --border: #e2e8f0;
    --success: #10b981;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --transition: 0.3s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html.smooth-scroll {
    scroll-behavior: smooth;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: 1rem;
}

/* --- Focus styles for accessibility --- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    color: var(--text);
}

h1 {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.015em;
}

h3 {
    font-size: clamp(1.125rem, 2vw, 1.35rem);
    font-weight: 600;
}

p {
    color: var(--text-light);
    line-height: 1.7;
}

/* --- Utility: Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.85rem 2rem;
    border-radius: var(--radius);
    transition: all var(--transition);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(212, 165, 116, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: var(--bg-alt);
}

/* --- Section Shared Styles --- */
section {
    padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 5vw, 2rem);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 3.5rem;
}

.section-header h2 {
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    max-width: 580px;
    margin: 0 auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
    background: rgba(212, 165, 116, 0.1);
    padding: 0.3rem 1rem;
    border-radius: 100px;
}

/* --- Animate In --- */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger grid children */
.animate-in.visible .problem-card:nth-child(2),
.animate-in.visible .step-card:nth-child(2),
.animate-in.visible .integration-card:nth-child(2),
.animate-in.visible .industry-card:nth-child(2),
.animate-in.visible .testimonial-card:nth-child(2) {
    transition-delay: 0.1s;
}

.animate-in.visible .problem-card:nth-child(3),
.animate-in.visible .step-card:nth-child(3),
.animate-in.visible .integration-card:nth-child(3),
.animate-in.visible .industry-card:nth-child(3),
.animate-in.visible .testimonial-card:nth-child(3) {
    transition-delay: 0.2s;
}

.animate-in.visible .step-card:nth-child(4),
.animate-in.visible .integration-card:nth-child(4),
.animate-in.visible .industry-card:nth-child(4) {
    transition-delay: 0.3s;
}

/* Grid children inherit animation */
.animate-in .problem-card,
.animate-in .step-card,
.animate-in .integration-card,
.animate-in .industry-card,
.animate-in .testimonial-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-in.visible .problem-card,
.animate-in.visible .step-card,
.animate-in.visible .integration-card,
.animate-in.visible .industry-card,
.animate-in.visible .testimonial-card {
    opacity: 1;
    transform: translateY(0);
}


/* ========================================================================
   1. NAVBAR
   ======================================================================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition), background var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 5vw, 2rem);
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
    text-decoration: none;
}

.nav-logo svg {
    color: var(--accent);
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.925rem;
    font-weight: 500;
    color: var(--text-light);
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-cta.btn.btn-primary {
    padding: 0.55rem 1.25rem;
    font-size: 0.875rem;
    border-radius: 8px;
}

/* Hamburger button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    cursor: pointer;
    background: none;
    border: none;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    padding: 0.5rem clamp(1.25rem, 5vw, 2rem) 1.25rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    max-width: 1200px;
    margin: 0 auto;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    display: block;
    padding: 0.75rem 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light);
    border-bottom: 1px solid var(--border);
    transition: color var(--transition);
}

.mobile-menu a:last-child {
    border-bottom: none;
    margin-top: 0.5rem;
}

.mobile-menu a:hover {
    color: var(--accent);
}

.mobile-menu .btn.btn-primary {
    text-align: center;
    margin-top: 0.5rem;
}


/* ========================================================================
   2. HERO
   ======================================================================== */

#hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(6rem, 12vw, 10rem) clamp(1.25rem, 5vw, 2rem) clamp(4rem, 8vw, 6rem);
    background:
        radial-gradient(ellipse at 20% 50%, rgba(212, 165, 116, 0.07) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(15, 43, 70, 0.04) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-content {
    text-align: left;
}

.hero-headline {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.hero-sub {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    max-width: 620px;
    margin: 0 0 2.5rem;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3.5rem;
}

.hero-ctas .btn-primary {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
}

.hero-ctas .btn-outline {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
}

/* Hero letter assembly — envelope, letter, business card stacked */
.hero-letter {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.mail-assembly {
    position: relative;
    width: 100%;
    max-width: 420px;
    padding-bottom: 120px; /* space for envelope peeking out */
}

/* --- Letter (middle layer) --- */
.hero-letter-paper {
    position: relative;
    z-index: 2;
    background: #fdf8f0;
    border-radius: 4px;
    padding: clamp(1.75rem, 3.5vw, 2.5rem) clamp(1.5rem, 3vw, 2rem);
    font-family: 'Caveat', cursive;
    color: #2c3e50;
    line-height: 1.55;
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.05),
        0 8px 24px rgba(15, 43, 70, 0.08);
    transform: rotate(-1deg);
    transition: transform 0.5s ease;
    overflow: hidden;
}

.hero-letter-paper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 30px,
            rgba(180, 165, 145, 0.12) 30px,
            rgba(180, 165, 145, 0.12) 31px
        );
    pointer-events: none;
    z-index: 0;
}

.hero-letter-paper:hover {
    transform: rotate(0deg);
}

.letter-text-content {
    position: relative;
    z-index: 1;
}

.hero-letter-paper .letter-date {
    font-size: 0.95rem;
    color: #8a7a6a;
    margin-bottom: 1rem;
}

.hero-letter-paper .letter-greeting {
    font-size: clamp(1.35rem, 2.5vw, 1.65rem);
    font-weight: 700;
    margin-bottom: 0.85rem;
}

.hero-letter-paper .letter-body-text {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    margin-bottom: 0.7rem;
    color: #3a4a5a;
}

.hero-letter-paper .letter-body-text strong {
    color: #2c3e50;
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: 3px;
}

.hero-letter-paper .letter-signature {
    font-size: clamp(1.2rem, 2.2vw, 1.4rem);
    margin-top: 1.25rem;
    font-weight: 700;
    font-style: italic;
}

/* --- Envelope (bottom layer, peeking out below letter) --- */
.hero-envelope {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) rotate(1.5deg);
    width: 95%;
    z-index: 1;
}

.envelope-front {
    background: linear-gradient(175deg, #ede2d4 0%, #d9ccbb 100%);
    border-radius: 6px;
    padding: 1.5rem 1.75rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 16px 40px rgba(15, 43, 70, 0.08);
    border: 1px solid rgba(160, 145, 125, 0.4);
    min-height: 140px;
    position: relative;
}

/* Inner border detail like a real envelope */
.envelope-front::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 1px solid rgba(160, 145, 125, 0.15);
    border-radius: 3px;
    pointer-events: none;
}

/* Red-blue postal stripe along bottom */
.envelope-front::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    border-radius: 0 0 6px 6px;
    background: repeating-linear-gradient(
        90deg,
        #c0392b 0px, #c0392b 8px,
        #fff 8px, #fff 12px,
        #2c5fa1 12px, #2c5fa1 20px,
        #fff 20px, #fff 24px
    );
    opacity: 0.5;
}

.envelope-address {
    display: flex;
    flex-direction: column;
    gap: 1px;
    font-family: 'Caveat', cursive;
    color: #4a4035;
    padding-top: 0.25rem;
}

.envelope-to {
    font-size: 1.25rem;
    font-weight: 700;
}

.envelope-street,
.envelope-city {
    font-size: 1rem;
}

.envelope-stamp-area {
    flex-shrink: 0;
}

.envelope-postage {
    width: 40px;
    height: 48px;
    border: 2px solid rgba(140, 125, 105, 0.4);
    border-radius: 2px;
    background:
        linear-gradient(135deg, rgba(212, 165, 116, 0.2) 0%, rgba(212, 165, 116, 0.05) 100%);
    position: relative;
}

.envelope-postage::after {
    content: '';
    position: absolute;
    inset: 3px;
    border: 1px dashed rgba(140, 125, 105, 0.3);
    border-radius: 1px;
}

/* --- Business card (top layer, overlapping letter) --- */
.hero-business-card {
    position: absolute;
    top: -14px;
    right: -10px;
    z-index: 3;
    display: flex;
    gap: 0.5rem;
    width: 210px;
    background: #fff;
    border-radius: 4px;
    padding: 0.6rem 0.7rem;
    font-family: 'Inter', sans-serif;
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.08),
        0 8px 24px rgba(15, 43, 70, 0.1);
    transform: rotate(3deg);
    transition: transform 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.hero-business-card:hover {
    transform: rotate(0deg) translateY(-2px);
}

.bcard-left {
    flex-shrink: 0;
    display: flex;
    align-items: flex-start;
    padding-top: 2px;
}

.bcard-logo {
    width: 28px;
    height: 28px;
    background: var(--primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 0.7rem;
}

.bcard-right {
    flex: 1;
    min-width: 0;
}

.bcard-company {
    font-size: 0.5rem;
    font-weight: 700;
    color: var(--accent-hover);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.1rem;
}

.bcard-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.bcard-title {
    font-size: 0.55rem;
    color: var(--text-light);
    margin-bottom: 0.3rem;
}

.bcard-divider {
    height: 1px;
    background: var(--border);
    margin-bottom: 0.3rem;
}

.bcard-details {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.bcard-details span {
    font-size: 0.5rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.bcard-details i {
    color: var(--accent);
    font-size: 0.4rem;
    width: 8px;
    text-align: center;
}

.hero-letter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary);
    color: #fff;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}

.hero-letter-badge i {
    color: var(--accent);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: var(--border);
}

.stat-number {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
    margin-top: 0.2rem;
}


/* ========================================================================
   3. TRUST BAR
   ======================================================================== */

#trust-bar {
    background: var(--bg-alt);
    padding: 2.5rem clamp(1.25rem, 5vw, 2rem);
    text-align: center;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

#trust-bar > p {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-light);
    margin-bottom: 1.25rem;
    opacity: 0.7;
}

.trust-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.trust-logo-item {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    opacity: 0.4;
    transition: opacity var(--transition);
    white-space: nowrap;
}

.trust-logo-item:hover {
    opacity: 0.7;
}


/* ========================================================================
   4. PROBLEM
   ======================================================================== */

#problem {
    background: var(--bg);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    max-width: 1100px;
    margin: 0 auto;
}

.problem-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    transition: all var(--transition);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.problem-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(212, 165, 116, 0.12);
    color: var(--accent);
    border-radius: 50%;
    font-size: 1.2rem;
    margin-bottom: 1.25rem;
}

.problem-card h3 {
    margin-bottom: 0.65rem;
    color: var(--text);
}

.problem-card p {
    font-size: 0.95rem;
    line-height: 1.65;
}


/* ========================================================================
   5. SOLUTION
   ======================================================================== */

#solution {
    background: var(--bg-alt);
}

.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.solution-text > p {
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 2rem;
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.solution-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.975rem;
    color: var(--text);
    line-height: 1.6;
}

.solution-features li i {
    color: var(--success);
    font-size: 0.85rem;
    margin-top: 0.35rem;
    flex-shrink: 0;
}

/* Letter Mockup */
.letter-mockup {
    display: flex;
    justify-content: center;
    perspective: 800px;
}

.letter-paper {
    background: #fdf8f0;
    padding: clamp(2rem, 4vw, 2.75rem) clamp(1.75rem, 3.5vw, 2.5rem);
    border-radius: 4px;
    transform: rotate(-1.5deg);
    max-width: 400px;
    width: 100%;
    position: relative;
    box-shadow:
        0 1px 3px rgba(0, 0, 0, 0.04),
        0 4px 12px rgba(0, 0, 0, 0.06),
        0 12px 32px rgba(0, 0, 0, 0.08),
        inset 0 0 60px rgba(0, 0, 0, 0.015);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.letter-paper:hover {
    transform: rotate(0deg);
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.06),
        0 8px 24px rgba(0, 0, 0, 0.1),
        0 20px 48px rgba(0, 0, 0, 0.1),
        inset 0 0 60px rgba(0, 0, 0, 0.015);
}

.letter-paper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    pointer-events: none;
}

.letter-body {
    font-family: 'Caveat', cursive;
    font-size: clamp(1.05rem, 2vw, 1.2rem);
    color: #2c3e50;
    line-height: 1.7;
    margin-bottom: 0.6rem;
}

.letter-signature {
    font-family: 'Caveat', cursive;
    font-size: clamp(1.05rem, 2vw, 1.2rem);
    color: #2c3e50;
    line-height: 1.6;
    margin-top: 1.2rem;
}


/* ========================================================================
   6. HOW IT WORKS
   ======================================================================== */

#how-it-works {
    background: var(--bg);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.75rem;
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
}

.step-card {
    text-align: center;
    padding: 2rem 1.5rem;
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: transparent;
}

/* Connector lines between steps */
.step-card:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 3.2rem;
    right: -0.95rem;
    width: calc(1.75rem);
    height: 2px;
    background: var(--border);
    z-index: 1;
}

.step-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.step-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(212, 165, 116, 0.1);
    color: var(--accent);
    border-radius: 50%;
    font-size: 1.25rem;
    margin: 0 auto 1.25rem;
}

.step-card h3 {
    margin-bottom: 0.65rem;
}

.step-card p {
    font-size: 0.925rem;
    line-height: 1.6;
}


/* ========================================================================
   7. INTEGRATIONS
   ======================================================================== */

#integrations {
    background: var(--bg-alt);
}

.integration-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    max-width: 900px;
    margin: 0 auto 2rem;
}

.integration-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.integration-card:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 12px rgba(212, 165, 116, 0.15);
    transform: translateY(-2px);
}

.integration-card i {
    font-size: 1.5rem;
    color: var(--primary-light);
    opacity: 0.6;
    transition: all var(--transition);
}

.integration-card:hover i {
    color: var(--accent);
    opacity: 1;
}

.integration-card span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    text-align: center;
}

.integration-note {
    text-align: center;
    font-size: 0.9rem;
    font-style: italic;
    color: var(--text-light);
}


/* ========================================================================
   8. INDUSTRIES
   ======================================================================== */

#industries {
    background: var(--bg);
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.industry-card {
    text-align: center;
    padding: 2rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    transition: all var(--transition);
}

.industry-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: transparent;
}

.industry-card i {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 1.25rem;
    background: rgba(212, 165, 116, 0.1);
    color: var(--accent);
    border-radius: 50%;
    font-size: 1.3rem;
    transition: all var(--transition);
}

.industry-card:hover i {
    background: var(--accent);
    color: var(--bg);
}

.industry-card h3 {
    margin-bottom: 0.5rem;
}

.industry-card p {
    font-size: 0.9rem;
    line-height: 1.6;
}


/* ========================================================================
   9. PRICING
   ======================================================================== */

#pricing {
    background: var(--bg-alt);
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    background: var(--bg);
    border-radius: calc(var(--radius) + 4px);
    border: 1px solid var(--border);
    border-top: 4px solid var(--accent);
    padding: 3rem 2.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
}

.pricing-amount {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.15rem;
}

.pricing-dollar {
    font-size: clamp(3.5rem, 7vw, 4.5rem);
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    letter-spacing: -0.03em;
}

.pricing-per {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-light);
}

.pricing-minimum {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.pricing-features {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-bottom: 2.25rem;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.5;
}

.pricing-features li i {
    color: var(--success);
    font-size: 0.8rem;
    margin-top: 0.3rem;
    flex-shrink: 0;
}

.pricing-cta.btn.btn-primary {
    width: 100%;
    padding: 1rem;
    font-size: 1.05rem;
}


/* ========================================================================
   10. ROI CALCULATOR
   ======================================================================== */

#roi-calculator {
    background: var(--bg);
}

.calculator-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.calculator-inputs {
    padding: 2.5rem;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.calc-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.calc-field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.01em;
}

.calc-field input,
.input-with-prefix {
    width: 100%;
}

.calc-field input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text);
    background: var(--bg);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.calc-field input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.15);
}

.input-with-prefix {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-with-prefix:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.15);
}

.input-prefix {
    padding: 0.75rem 0.75rem 0.75rem 1rem;
    color: var(--text-light);
    font-weight: 500;
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    font-size: 0.95rem;
    user-select: none;
}

.input-with-prefix input {
    border: none;
    border-radius: 0;
    padding-left: 0.75rem;
}

.input-with-prefix input:focus {
    outline: none;
    box-shadow: none;
    border-color: transparent;
}

.calculator-results {
    padding: 2.5rem;
    background: var(--bg-alt);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-content: center;
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.result-value {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.result-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    line-height: 1.4;
}


/* ========================================================================
   11. TESTIMONIALS
   ======================================================================== */

#testimonials {
    background: var(--bg-alt);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    max-width: 1100px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    position: relative;
    transition: all var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.testimonial-card::before {
    content: '\201C';
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 4rem;
    line-height: 1;
    color: var(--accent);
    opacity: 0.15;
    font-family: Georgia, serif;
    pointer-events: none;
}

.testimonial-stars {
    display: flex;
    gap: 0.2rem;
    margin-bottom: 1rem;
}

.testimonial-stars i {
    color: var(--accent);
    font-size: 0.85rem;
}

.testimonial-card blockquote {
    margin-bottom: 1.25rem;
}

.testimonial-card blockquote p {
    font-size: 0.95rem;
    font-style: italic;
    color: var(--text);
    line-height: 1.7;
}

.testimonial-author {
    font-size: 0.925rem;
    font-weight: 600;
    color: var(--text);
}

.testimonial-role {
    font-size: 0.825rem;
    color: var(--text-light);
    margin-top: 0.15rem;
}


/* ========================================================================
   12. FAQ
   ======================================================================== */

#faq {
    background: var(--bg);
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
    border-top: 1px solid var(--border);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1.25rem 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    gap: 1rem;
    transition: color var(--transition);
}

.faq-question span {
    font-size: 1.025rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.5;
}

.faq-question i {
    font-size: 0.75rem;
    color: var(--text-light);
    transition: transform 0.35s ease, color var(--transition);
    flex-shrink: 0;
}

.faq-question:hover span {
    color: var(--accent);
}

.faq-question:hover i {
    color: var(--accent);
}

/* Chevron rotation on active */
.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-item.active .faq-question span {
    color: var(--accent);
}

/* FAQ answer */
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 0 1.25rem 0;
    font-size: 0.95rem;
    line-height: 1.75;
}


/* ========================================================================
   13. CONTACT
   ======================================================================== */

#contact {
    background: var(--bg-dark);
    padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 5vw, 2rem);
}

.cta-section {
    max-width: 1100px;
    margin: 0 auto;
}

.cta-section > h2 {
    color: #ffffff;
    text-align: center;
    margin-bottom: 0.75rem;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.cta-section > p {
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-top: 1rem;
}

.contact-step {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-step i {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(212, 165, 116, 0.15);
    color: var(--accent);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-step span {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

/* Contact form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.825rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select {
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: #ffffff;
    font-size: 0.95rem;
    transition: all var(--transition);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-group select {
    appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='rgba(255,255,255,0.5)' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-group select option {
    background: var(--primary);
    color: #ffffff;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.2);
}

.contact-form .btn.btn-primary {
    width: 100%;
    padding: 1rem;
    font-size: 1.05rem;
    margin-top: 0.5rem;
}

.form-success {
    text-align: center;
    padding: 1rem;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 8px;
    margin-top: 0.5rem;
}

.form-success p {
    color: var(--success);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-success[hidden] {
    display: none;
}


/* ========================================================================
   14. FOOTER
   ======================================================================== */

.footer {
    background: var(--bg-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0 clamp(1.25rem, 5vw, 2rem);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    padding: 3.5rem 0 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .nav-logo {
    color: #ffffff;
    margin-bottom: 1rem;
}

.footer-brand .nav-logo svg {
    color: var(--accent);
}

.footer-brand > p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    max-width: 360px;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-col h4 {
    font-size: 0.825rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0.5rem;
}

.footer-col a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding: 1.5rem 0;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
    text-align: center;
}


/* ========================================================================
   RESPONSIVE
   ======================================================================== */

/* --- Tablet (1024px and below) --- */
@media (max-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Hide connectors on 2x2 layout */
    .step-card::after {
        display: none;
    }

    .integration-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .industry-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonial-card:last-child {
        grid-column: 1 / -1;
        max-width: 540px;
        justify-self: center;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* --- Mobile (768px and below) --- */
@media (max-width: 768px) {
    /* Navbar mobile */
    .nav-links {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    /* Hero */
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .hero-ctas {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-letter {
        order: -1;
    }

    .mail-assembly {
        max-width: 360px;
    }

    .hero-business-card {
        right: -5px;
        width: 190px;
        padding: 0.5rem 0.6rem;
    }

    #hero {
        min-height: auto;
        padding-top: 5rem;
        padding-bottom: 4rem;
    }

    .hero-ctas .btn {
        width: 100%;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.25rem;
    }

    .stat-item {
        padding: 0;
    }

    .stat-item::after {
        display: none;
    }

    /* Problem */
    .problem-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    /* Solution */
    .solution-content {
        grid-template-columns: 1fr;
    }

    .letter-mockup {
        order: -1;
    }

    /* Steps */
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .step-card::after {
        display: none;
    }

    /* Integrations */
    .integration-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    /* Industries */
    .industry-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    /* Pricing */
    .pricing-card {
        padding: 2.25rem 1.75rem;
    }

    /* ROI Calculator */
    .calculator-card {
        grid-template-columns: 1fr;
    }

    .calculator-results {
        border-top: 1px solid var(--border);
    }

    /* Testimonials */
    .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .testimonial-card:last-child {
        max-width: none;
    }

    /* Contact */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-info {
        padding-top: 0;
    }

    /* Footer */
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
}

/* --- Small mobile (480px and below) --- */
@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    section {
        padding: 3rem 1rem;
    }

    #hero {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    #contact {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .hero-ctas {
        flex-direction: column;
    }

    .integration-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .integration-card {
        padding: 1rem 0.75rem;
    }

    .industry-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card {
        padding: 2rem 1.25rem;
    }

    .calculator-inputs,
    .calculator-results {
        padding: 1.75rem;
    }

    .calculator-results {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .letter-paper {
        padding: 1.75rem 1.5rem;
    }

    .trust-logos {
        gap: 1rem 1.75rem;
    }
}