/* ============================================
   SOCMED AGENT — Expressive Design System
   ============================================ */

/* --- Design Tokens --- */
:root {
    /* Colors */
    --color-primary: #db2777;
    --color-primary-light: #f472b6;
    --color-primary-dark: #be185d;
    --color-secondary: #2563eb;
    --color-secondary-light: #60a5fa;
    --color-success: #16A34A;
    --color-warning: #D97706;
    --color-danger: #DC2626;
    --color-surface: #FFFFFF;
    --color-surface-alt: #f8f9fc;
    --color-text: #111827;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-border: #e5e7eb;

    /* Agent Colors */
    --color-strategist: #8b5cf6;
    --color-copywriter: #f59e0b;
    --color-designer: #ec4899;
    --color-analyst: #3b82f6;
    --color-executor: #10b981;

    /* Typography */
    --font-family: 'IBM Plex Mono', monospace;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-md: 18px;
    --font-size-lg: 24px;
    --font-size-xl: 32px;
    --font-size-2xl: 40px;
    --font-size-3xl: 48px;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 48px rgba(0,0,0,0.16);
    --shadow-glow: 0 0 40px rgba(219, 39, 119, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    color: var(--color-text);
    background: var(--color-surface);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* --- Utilities --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-16);
}

.section-header__badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-primary);
    background: rgba(219, 39, 119, 0.08);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-header__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.section-header__desc {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-family);
    font-weight: var(--font-weight-semibold);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn--sm {
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-4);
}

.btn--lg {
    font-size: var(--font-size-base);
    padding: var(--space-3) var(--space-6);
}

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

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

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

.btn--white:hover {
    background: var(--color-surface-alt);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn__arrow {
    transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
    transform: translateX(4px);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

.nav__logo-icon {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

/* --- Hero --- */
.hero {
    padding: calc(64px + var(--space-20)) 0 var(--space-20);
    background: linear-gradient(160deg, var(--color-surface) 0%, var(--color-surface-alt) 50%, rgba(219, 39, 119, 0.03) 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero__badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-primary);
    background: rgba(219, 39, 119, 0.08);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.hero__title--accent {
    display: block;
    color: var(--color-primary);
}

.hero__subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero__stats {
    display: flex;
    gap: var(--space-8);
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

.hero__stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Hero Visual — Floating Agent Cards */
.hero__visual {
    position: relative;
    height: 480px;
}

.hero__card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--color-surface);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid;
    animation: float 6s ease-in-out infinite;
    transition: transform var(--transition-base);
}

.hero__card:hover {
    transform: scale(1.05);
}

.hero__card-icon {
    font-size: var(--font-size-lg);
}

.hero__card-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.hero__card--1 {
    top: 10%;
    left: 15%;
    border-color: var(--color-strategist);
    animation-delay: 0s;
}

.hero__card--2 {
    top: 5%;
    right: 10%;
    border-color: var(--color-copywriter);
    animation-delay: 1s;
}

.hero__card--3 {
    top: 45%;
    left: 5%;
    border-color: var(--color-designer);
    animation-delay: 2s;
}

.hero__card--4 {
    top: 55%;
    right: 5%;
    border-color: var(--color-analyst);
    animation-delay: 3s;
}

.hero__card--5 {
    bottom: 5%;
    left: 25%;
    border-color: var(--color-executor);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* --- Agents Section --- */
.agents {
    padding: var(--space-24) 0;
    background: var(--color-surface-alt);
}

.agents__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.agent-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.agent-card--strategist::before { background: var(--color-strategist); }
.agent-card--copywriter::before { background: var(--color-copywriter); }
.agent-card--designer::before { background: var(--color-designer); }
.agent-card--analyst::before { background: var(--color-analyst); }
.agent-card--executor::before { background: var(--color-executor); }

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

.agent-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.agent-card__icon {
    font-size: var(--font-size-xl);
}

.agent-card__number {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-light);
}

.agent-card__title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-3);
}

.agent-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.agent-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.agent-card__features li {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    padding-left: var(--space-4);
    position: relative;
}

.agent-card__features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* --- Features Section --- */
.features {
    padding: var(--space-24) 0;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.feature-card {
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.feature-card__icon {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-4);
}

.feature-card__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.feature-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* --- How It Works --- */
.how-it-works {
    padding: var(--space-24) 0;
    background: var(--color-surface-alt);
}

.steps {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step {
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
    width: 100%;
}

.step__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
}

.step__content {
    padding-top: var(--space-2);
}

.step__title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.step__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.step__connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
    margin-left: 23px;
}

/* --- CTA Section --- */
.cta {
    padding: var(--space-24) 0;
}

.cta__inner {
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #7c3aed 100%);
    padding: var(--space-16) var(--space-8);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.cta__inner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.cta__inner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
}

.cta__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: white;
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
}

.cta__desc {
    font-size: var(--font-size-md);
    color: rgba(255, 255, 255, 0.85);
    max-width: 480px;
    margin: 0 auto var(--space-8);
    position: relative;
    z-index: 1;
}

.cta__actions {
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
}

.cta__note {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.6);
    position: relative;
    z-index: 1;
}

/* --- Footer --- */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    gap: var(--space-16);
    margin-bottom: var(--space-12);
}

.footer__brand {
    max-width: 320px;
}

.footer__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-4);
    line-height: 1.6;
}

.footer__links {
    display: flex;
    gap: var(--space-16);
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__heading {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer__bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    text-align: center;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .hero__visual {
        height: 320px;
    }

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

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

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 36px;
        --font-size-2xl: 32px;
        --font-size-xl: 26px;
    }

    .nav__links {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    /* Mobile menu */
    .nav__links.is-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        padding: var(--space-6);
        border-bottom: 1px solid var(--color-border);
        gap: var(--space-4);
    }

    .hero {
        padding: calc(64px + var(--space-12)) 0 var(--space-12);
    }

    .hero__visual {
        display: none;
    }

    .hero__stats {
        gap: var(--space-6);
    }

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

    .agents,
    .features,
    .how-it-works,
    .cta {
        padding: var(--space-16) 0;
    }

    .section-header {
        margin-bottom: var(--space-12);
    }

    .footer__inner {
        flex-direction: column;
        gap: var(--space-8);
    }

    .cta__inner {
        padding: var(--space-12) var(--space-6);
    }
}

/* --- Auth Pages --- */
.is-auth-page {
    background: var(--color-surface-alt);
    min-height: 100vh;
}

.auth {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-8) var(--space-6);
}

.auth__container {
    width: 100%;
    max-width: 460px;
}

.auth__card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-12);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.auth__header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth__header .nav__logo {
    display: inline-flex;
    margin-bottom: var(--space-6);
}

.auth__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.auth__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.auth__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.auth__footer-text {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-6);
}

/* --- Form Elements --- */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.form-input {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: var(--space-3) var(--space-4);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    width: 100%;
}

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

.form-input:hover {
    border-color: var(--color-text-light);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(219, 39, 119, 0.1);
}

.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .form-input {
    padding-right: 44px;
}

.form-input-toggle {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-1);
    font-size: var(--font-size-sm);
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.form-input-toggle:hover {
    opacity: 1;
}

/* Checkbox */
.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.5;
}

.form-checkbox input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form-checkbox__mark {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    margin-top: 1px;
}

.form-checkbox input:checked + .form-checkbox__mark {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-checkbox input:checked + .form-checkbox__mark::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: var(--font-weight-bold);
}

.form-checkbox input:focus-visible + .form-checkbox__mark {
    box-shadow: 0 0 0 3px rgba(219, 39, 119, 0.1);
}

.form-checkbox__text {
    flex: 1;
}

.form-link {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.form-link:hover {
    color: var(--color-primary-dark);
}

/* Full width button */
.btn--full {
    width: 100%;
    justify-content: center;
}

/* Alerts */
.alert {
    font-size: var(--font-size-sm);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    line-height: 1.5;
}

.alert--danger {
    background: rgba(220, 38, 38, 0.08);
    color: var(--color-danger);
    border: 1px solid rgba(220, 38, 38, 0.15);
}

.alert--success {
    background: rgba(22, 163, 74, 0.08);
    color: var(--color-success);
    border: 1px solid rgba(22, 163, 74, 0.15);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 480px) {
    :root {
        --font-size-3xl: 28px;
        --font-size-xl: 22px;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__stats {
        flex-direction: column;
        gap: var(--space-4);
    }

    .auth__card {
        padding: var(--space-8) var(--space-6);
    }
}