/* ============================================================================
   TheFridayMail — Design System & Styles
   Professional ESP Landing Page
   ============================================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Colors – Deep navy/charcoal dark theme */
    --c-bg-primary: #0a0e17;
    --c-bg-secondary: #0f1520;
    --c-bg-card: #141b2a;
    --c-bg-card-hover: #1a2235;
    --c-bg-input: #0f1520;
    --c-border: #1e2a3d;
    --c-border-hover: #2d3f5b;
    --c-text-primary: #e6edf3;
    --c-text-secondary: #8b949e;
    --c-text-tertiary: #6e7681;
    --c-accent: #58a6ff;
    --c-accent-dim: #1f6feb;
    --c-accent-glow: rgba(88, 166, 255, 0.15);
    --c-accent-gradient: linear-gradient(135deg, #58a6ff 0%, #1f6feb 100%);
    --c-success: #3fb950;
    --c-surface-glass: rgba(20, 27, 42, 0.75);

    /* Typography */
    --ff-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3.25rem;
    --fs-5xl: 4rem;

    /* Spacing */
    --sp-xs: 0.25rem;
    --sp-sm: 0.5rem;
    --sp-md: 1rem;
    --sp-lg: 1.5rem;
    --sp-xl: 2rem;
    --sp-2xl: 3rem;
    --sp-3xl: 4rem;
    --sp-4xl: 6rem;
    --sp-5xl: 8rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --t-fast: 150ms;
    --t-normal: 250ms;
    --t-slow: 400ms;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(88, 166, 255, 0.12);

    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--ff-primary);
    font-size: var(--fs-base);
    line-height: 1.7;
    color: var(--c-text-primary);
    background-color: var(--c-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--c-accent);
    text-decoration: none;
    transition: color var(--t-fast) var(--ease-out);
}

a:hover {
    color: var(--c-text-primary);
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-xl);
}

/* --- Section Header --- */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--sp-4xl);
}

.section-tag {
    display: inline-block;
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--c-accent);
    background: var(--c-accent-glow);
    border: 1px solid rgba(88, 166, 255, 0.2);
    padding: var(--sp-xs) var(--sp-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--sp-lg);
}

.section-title {
    font-size: var(--fs-3xl);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--sp-md);
}

.section-desc {
    font-size: var(--fs-md);
    color: var(--c-text-secondary);
    line-height: 1.7;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    padding: 14px 32px;
    font-family: var(--ff-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--t-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn--primary {
    background: var(--c-accent-gradient);
    color: #fff;
    box-shadow: 0 4px 15px rgba(88, 166, 255, 0.25);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(88, 166, 255, 0.35);
    color: #fff;
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--secondary {
    background: transparent;
    color: var(--c-text-primary);
    border: 1px solid var(--c-border);
}

.btn--secondary:hover {
    border-color: var(--c-border-hover);
    background: var(--c-bg-card);
    color: var(--c-text-primary);
}

.btn--full {
    width: 100%;
}

.btn__loading {
    display: none;
}

.btn--loading .btn__text {
    display: none;
}

.btn--loading .btn__loading {
    display: inline;
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: border-color var(--t-normal) var(--ease-out),
                background var(--t-normal) var(--ease-out);
}

.nav--scrolled {
    border-bottom-color: var(--c-border);
    background: rgba(10, 14, 23, 0.95);
}

.nav__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    color: var(--c-text-primary);
    text-decoration: none;
}

.nav__logo:hover {
    color: var(--c-text-primary);
}

.nav__logo-icon {
    width: 36px;
    height: 36px;
}

.nav__brand {
    font-size: var(--fs-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--sp-xl);
}

.nav__link {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--c-text-secondary);
    transition: color var(--t-fast) var(--ease-out);
    position: relative;
}

.nav__link:hover {
    color: var(--c-text-primary);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--c-accent-gradient);
    border-radius: 1px;
    transition: width var(--t-normal) var(--ease-out);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__cta {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: #fff;
    background: var(--c-accent-gradient);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    transition: all var(--t-normal) var(--ease-out);
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.2);
}

.nav__cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
    color: #fff;
}

/* Mobile Toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 1001;
}

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--c-text-primary);
    border-radius: 1px;
    transition: all var(--t-normal) var(--ease-out);
    transform-origin: center;
}

.nav__toggle--active span:first-child {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle--active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle--active span:last-child {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================================
   HERO
   ============================================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + var(--sp-4xl)) 0 var(--sp-4xl);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 30%, transparent 80%);
}

.hero__glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero__glow--1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: glow-pulse 8s ease-in-out infinite alternate;
}

.hero__glow--2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(31, 111, 235, 0.12) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: glow-pulse 10s ease-in-out infinite alternate-reverse;
}

@keyframes glow-pulse {
    0% { opacity: 0.3; transform: scale(1); }
    100% { opacity: 0.5; transform: scale(1.15); }
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--c-accent);
    background: rgba(88, 166, 255, 0.08);
    border: 1px solid rgba(88, 166, 255, 0.15);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    margin-bottom: var(--sp-xl);
}

.hero__title {
    font-size: var(--fs-5xl);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: var(--sp-xl);
}

.hero__title--accent {
    background: var(--c-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--fs-md);
    color: var(--c-text-secondary);
    max-width: 620px;
    margin: 0 auto var(--sp-2xl);
    line-height: 1.8;
}

.hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-md);
    margin-bottom: var(--sp-4xl);
}

.hero__stats {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2xl);
    background: var(--c-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg) var(--sp-2xl);
}

.hero__stat {
    text-align: center;
}

.hero__stat-value {
    display: block;
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--c-accent);
    letter-spacing: -0.01em;
}

.hero__stat-label {
    display: block;
    font-size: var(--fs-xs);
    color: var(--c-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 2px;
}

.hero__stat-divider {
    width: 1px;
    height: 36px;
    background: var(--c-border);
}

/* ============================================================================
   SERVICES
   ============================================================================ */
.services {
    padding: var(--sp-5xl) 0;
    background: var(--c-bg-secondary);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-xl);
}

.service-card {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-2xl);
    transition: all var(--t-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--c-accent-gradient);
    opacity: 0;
    transition: opacity var(--t-normal) var(--ease-out);
}

.service-card:hover {
    background: var(--c-bg-card-hover);
    border-color: var(--c-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card__icon {
    width: 48px;
    height: 48px;
    color: var(--c-accent);
    margin-bottom: var(--sp-lg);
}

.service-card__title {
    font-size: var(--fs-lg);
    font-weight: 700;
    margin-bottom: var(--sp-sm);
    letter-spacing: -0.01em;
}

.service-card__text {
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
    line-height: 1.7;
}

/* ============================================================================
   FEATURES
   ============================================================================ */
.features {
    padding: var(--sp-5xl) 0;
    position: relative;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-xl);
}

.feature {
    padding: var(--sp-xl);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    transition: all var(--t-normal) var(--ease-out);
}

.feature:hover {
    border-color: var(--c-border);
    background: var(--c-bg-card);
}

.feature__number {
    font-size: var(--fs-3xl);
    font-weight: 800;
    color: var(--c-accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--sp-md);
    letter-spacing: -0.02em;
}

.feature:hover .feature__number {
    opacity: 0.6;
}

.feature__title {
    font-size: var(--fs-base);
    font-weight: 700;
    margin-bottom: var(--sp-sm);
    letter-spacing: -0.01em;
}

.feature__text {
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
    line-height: 1.7;
}

/* ============================================================================
   INFRASTRUCTURE
   ============================================================================ */
.infra {
    padding: var(--sp-5xl) 0;
    background: var(--c-bg-secondary);
    position: relative;
}

.infra::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.infra__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4xl);
    align-items: center;
}

.infra__text {
    font-size: var(--fs-md);
    color: var(--c-text-secondary);
    margin-bottom: var(--sp-2xl);
    line-height: 1.7;
}

.infra__stack {
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
}

.infra__item {
    display: flex;
    align-items: baseline;
    gap: var(--sp-lg);
    padding: var(--sp-sm) 0;
    border-bottom: 1px solid var(--c-border);
}

.infra__item:last-child {
    border-bottom: none;
}

.infra__item-label {
    font-size: var(--fs-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-accent);
    min-width: 64px;
}

.infra__item-value {
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
}

/* Terminal Visual */
.infra__terminal {
    background: #0d1117;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.infra__terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #161b22;
    border-bottom: 1px solid var(--c-border);
}

.infra__terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--c-border);
}

.infra__terminal-dot:first-child { background: #ff5f57; }
.infra__terminal-dot:nth-child(2) { background: #febc2e; }
.infra__terminal-dot:nth-child(3) { background: #28c840; }

.infra__terminal-title {
    font-size: var(--fs-xs);
    color: var(--c-text-tertiary);
    margin-left: auto;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.infra__terminal-body {
    padding: var(--sp-lg);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 13px;
    line-height: 1.9;
}

.terminal-line {
    opacity: 0;
    animation: terminal-type 0.3s var(--ease-out) forwards;
}

.terminal-line:nth-child(1)  { animation-delay: 0.2s; }
.terminal-line:nth-child(2)  { animation-delay: 0.5s; }
.terminal-line:nth-child(3)  { animation-delay: 0.7s; }
.terminal-line:nth-child(4)  { animation-delay: 0.9s; }
.terminal-line:nth-child(5)  { animation-delay: 1.1s; }
.terminal-line:nth-child(6)  { animation-delay: 1.3s; }
.terminal-line:nth-child(7)  { animation-delay: 1.5s; }
.terminal-line:nth-child(8)  { animation-delay: 1.7s; }
.terminal-line:nth-child(9)  { animation-delay: 1.9s; }
.terminal-line:nth-child(10) { animation-delay: 2.1s; }
.terminal-line:nth-child(11) { animation-delay: 2.3s; }
.terminal-line:nth-child(12) { animation-delay: 2.6s; }

.terminal-line--highlight {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--c-border);
}

@keyframes terminal-type {
    from { opacity: 0; transform: translateX(-4px); }
    to   { opacity: 1; transform: translateX(0); }
}

.t-prompt { color: var(--c-accent); }
.t-cmd    { color: var(--c-text-primary); }
.t-ok     { color: var(--c-success); font-weight: 600; }
.t-result { color: var(--c-success); font-weight: 600; }

/* ============================================================================
   FAQ
   ============================================================================ */
.faq {
    padding: var(--sp-5xl) 0;
}

.faq__list {
    max-width: 740px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
}

.faq__item {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--t-normal) var(--ease-out);
}

.faq__item[open] {
    border-color: var(--c-border-hover);
}

.faq__question {
    font-size: var(--fs-base);
    font-weight: 600;
    padding: var(--sp-lg) var(--sp-xl);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-md);
    transition: color var(--t-fast) var(--ease-out);
}

.faq__question::-webkit-details-marker {
    display: none;
}

.faq__question::after {
    content: '+';
    font-size: var(--fs-xl);
    font-weight: 300;
    color: var(--c-text-tertiary);
    flex-shrink: 0;
    transition: transform var(--t-normal) var(--ease-out);
}

.faq__item[open] .faq__question::after {
    transform: rotate(45deg);
    color: var(--c-accent);
}

.faq__question:hover {
    color: var(--c-accent);
}

.faq__answer {
    padding: 0 var(--sp-xl) var(--sp-lg);
    animation: faq-open var(--t-normal) var(--ease-out);
}

.faq__answer p {
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
    line-height: 1.8;
}

@keyframes faq-open {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================================
   CONTACT
   ============================================================================ */
.contact {
    padding: var(--sp-5xl) 0;
    background: var(--c-bg-secondary);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.contact__layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--sp-4xl);
    align-items: start;
}

.contact__text {
    font-size: var(--fs-md);
    color: var(--c-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--sp-2xl);
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
}

.contact__detail {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
}

.contact__detail-icon {
    width: 20px;
    height: 20px;
    color: var(--c-accent);
    flex-shrink: 0;
}

/* Form */
.contact__form-wrapper {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-2xl);
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--sp-xs);
}

.form-label {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--c-text-primary);
}

.form-optional {
    font-weight: 400;
    color: var(--c-text-tertiary);
}

.form-input {
    font-family: var(--ff-primary);
    font-size: var(--fs-sm);
    color: var(--c-text-primary);
    background: var(--c-bg-input);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    transition: border-color var(--t-fast) var(--ease-out),
                box-shadow var(--t-fast) var(--ease-out);
    outline: none;
}

.form-input::placeholder {
    color: var(--c-text-tertiary);
}

.form-input:focus {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px var(--c-accent-glow);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: #f85149;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
    padding: var(--sp-3xl) 0 var(--sp-xl);
    border-top: 1px solid var(--c-border);
}

.footer__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-2xl);
}

.footer__tagline {
    font-size: var(--fs-sm);
    color: var(--c-text-tertiary);
    margin-top: var(--sp-sm);
}

.footer__nav {
    display: flex;
    gap: var(--sp-xl);
}

.footer__link {
    font-size: var(--fs-sm);
    color: var(--c-text-secondary);
    transition: color var(--t-fast) var(--ease-out);
}

.footer__link:hover {
    color: var(--c-text-primary);
}

.footer__bottom {
    padding-top: var(--sp-xl);
    border-top: 1px solid var(--c-border);
}

.footer__copy {
    font-size: var(--fs-xs);
    color: var(--c-text-tertiary);
    text-align: center;
}

/* ============================================================================
   TOAST NOTIFICATION
   ============================================================================ */
.toast {
    position: fixed;
    bottom: var(--sp-xl);
    right: var(--sp-xl);
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    background: var(--c-bg-card);
    border: 1px solid rgba(63, 185, 80, 0.3);
    border-radius: var(--radius-md);
    padding: var(--sp-md) var(--sp-lg);
    color: var(--c-success);
    font-size: var(--fs-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transform: translateY(120%);
    opacity: 0;
    transition: all var(--t-slow) var(--ease-spring);
    z-index: 2000;
    max-width: 420px;
}

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

.toast__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.toast__close {
    background: none;
    border: none;
    color: var(--c-text-tertiary);
    font-size: var(--fs-xl);
    cursor: pointer;
    padding: 0 0 0 var(--sp-sm);
    line-height: 1;
}

/* ============================================================================
   SCROLL ANIMATIONS
   ============================================================================ */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.services__grid [data-animate]:nth-child(2) { transition-delay: 0.1s; }
.services__grid [data-animate]:nth-child(3) { transition-delay: 0.2s; }
.services__grid [data-animate]:nth-child(4) { transition-delay: 0.3s; }

.features__grid [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.features__grid [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.features__grid [data-animate]:nth-child(4) { transition-delay: 0.24s; }
.features__grid [data-animate]:nth-child(5) { transition-delay: 0.32s; }
.features__grid [data-animate]:nth-child(6) { transition-delay: 0.4s; }

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 1024px) {
    .hero__title {
        font-size: var(--fs-4xl);
    }

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

    .infra__layout {
        grid-template-columns: 1fr;
        gap: var(--sp-2xl);
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav__links {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        background: var(--c-bg-secondary);
        border-left: 1px solid var(--c-border);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--nav-height) + var(--sp-xl)) var(--sp-xl) var(--sp-xl);
        gap: var(--sp-md);
        transform: translateX(100%);
        transition: transform var(--t-slow) var(--ease-out);
        z-index: 999;
    }

    .nav__links--open {
        transform: translateX(0);
    }

    .nav__toggle {
        display: flex;
    }

    .nav__cta {
        width: 100%;
        text-align: center;
        margin-top: var(--sp-md);
    }

    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + var(--sp-3xl)) 0 var(--sp-3xl);
    }

    .hero__title {
        font-size: var(--fs-3xl);
    }

    .hero__subtitle {
        font-size: var(--fs-base);
    }

    .hero__actions {
        flex-direction: column;
        margin-bottom: var(--sp-2xl);
    }

    .hero__actions .btn {
        width: 100%;
    }

    .hero__stats {
        flex-direction: column;
        gap: var(--sp-lg);
        padding: var(--sp-lg);
        width: 100%;
    }

    .hero__stat-divider {
        width: 40px;
        height: 1px;
    }

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

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

    .section-title {
        font-size: var(--fs-2xl);
    }

    .contact__layout {
        grid-template-columns: 1fr;
        gap: var(--sp-2xl);
    }

    .footer__content {
        flex-direction: column;
        text-align: center;
        gap: var(--sp-xl);
    }

    .footer__nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--sp-md);
    }

    .toast {
        left: var(--sp-md);
        right: var(--sp-md);
        bottom: var(--sp-md);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--sp-md);
    }

    .hero__title {
        font-size: var(--fs-2xl);
    }

    .contact__form-wrapper {
        padding: var(--sp-lg);
    }
}

/* --- Print styles --- */
@media print {
    .nav, .hero__bg, .toast, .nav__toggle {
        display: none !important;
    }
    body {
        background: #fff;
        color: #000;
    }
}