/* ============================================================
 * File: /var/www/social/public/assets/css/app.css
 * Purpose: Main responsive UI shell styles
 * Project: Padare Social Platform
 * Version: Phase2-v1.0
 * ============================================================
 */

/* ============================================================
 * Theme Tokens
 * ============================================================
 */
:root {
    --color-main-blue: #0099ff;
    --color-main-blue-dark: #0077cc;
    --color-secondary-red: #ff2f2f;
    --color-accent-yellow: #ffd400;

    --color-text-dark: #111827;
    --color-text-grey: #6b7280;
    --color-white: #ffffff;

    --color-bg: #f3f4f6;
    --color-card: #ffffff;
    --color-border: #e5e7eb;

    --shadow-soft: 0 18px 40px rgba(17, 24, 39, 0.10);
    --radius-card: 18px;
}

/* ============================================================
 * Base
 * ============================================================
 */
* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(0, 153, 255, 0.12), transparent 32rem),
        radial-gradient(circle at bottom right, rgba(255, 212, 0, 0.16), transparent 28rem),
        var(--color-bg);
    color: var(--color-text-dark);
}

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

button,
input,
textarea,
select {
    font: inherit;
}

/* ============================================================
 * Top Bar
 * ============================================================
 */
.topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--color-main-blue);
    color: var(--color-white);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.topbar-inner {
    max-width: 1180px;
    margin: 0 auto;
    min-height: 64px;
    padding: 0 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
}

.brand-mark {
    width: 36px;
    height: 36px;
    display: inline-grid;
    place-items: center;
    background: var(--color-white);
    color: var(--color-main-blue);
    border-radius: 12px;
    font-weight: 900;
}

.brand-text {
    letter-spacing: -0.02em;
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.desktop-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.92);
    font-weight: 700;
}

.desktop-nav a:hover,
.desktop-nav a.active {
    background: rgba(255, 255, 255, 0.18);
    color: var(--color-white);
}

.mobile-menu-button {
    display: none;
    border: 0;
    background: rgba(255, 255, 255, 0.16);
    color: var(--color-white);
    border-radius: 12px;
    padding: 8px 12px;
    cursor: pointer;
}

/* ============================================================
 * Page Shell
 * ============================================================
 */
.page-shell {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 36px 18px 90px;
}

/* ============================================================
 * Hero Panel
 * ============================================================
 */
.hero-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    gap: 24px;
    align-items: stretch;
}

.hero-copy,
.foundation-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    padding: 34px;
}

.phase-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 153, 255, 0.10);
    color: var(--color-main-blue-dark);
    border: 1px solid rgba(0, 153, 255, 0.22);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 800;
    margin-bottom: 18px;
}

.hero-copy h1 {
    margin: 0;
    font-size: clamp(32px, 5vw, 56px);
    line-height: 1.02;
    letter-spacing: -0.045em;
}

.hero-copy p {
    margin: 18px 0 0;
    color: var(--color-text-grey);
    font-size: 18px;
    line-height: 1.65;
    max-width: 680px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 999px;
    font-weight: 800;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background: var(--color-main-blue-dark);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-text-dark);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-main-blue);
    color: var(--color-main-blue);
}

/* ============================================================
 * Foundation Card
 * ============================================================
 */
.foundation-card h2 {
    margin: 0 0 18px;
    font-size: 24px;
}

.module-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.module-item {
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 16px;
    background: #ffffff;
}

.module-item strong {
    display: block;
    margin-bottom: 6px;
}

.module-item span {
    display: inline-flex;
    color: #047857;
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    border-radius: 999px;
    padding: 4px 8px;
    font-size: 13px;
    font-weight: 800;
}

/* ============================================================
 * Mobile Drawer
 * ============================================================
 */
.mobile-drawer {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    width: min(320px, 86vw);
    background: var(--color-white);
    box-shadow: 20px 0 45px rgba(17, 24, 39, 0.22);
    transform: translateX(-105%);
    transition: transform 180ms ease-in-out;
}

.mobile-drawer.is-open {
    transform: translateX(0);
}

.mobile-drawer-header {
    min-height: 64px;
    padding: 0 18px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-drawer-header button {
    border: 0;
    background: var(--color-bg);
    border-radius: 10px;
    padding: 8px 12px;
    cursor: pointer;
}

.mobile-drawer-nav {
    display: grid;
    gap: 4px;
    padding: 14px;
}

.mobile-drawer-nav a {
    padding: 13px 14px;
    border-radius: 12px;
    color: var(--color-text-dark);
    font-weight: 700;
}

.mobile-drawer-nav a:hover {
    background: rgba(0, 153, 255, 0.10);
    color: var(--color-main-blue);
}

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 55;
    background: rgba(17, 24, 39, 0.42);
    opacity: 0;
    visibility: hidden;
    transition: opacity 180ms ease-in-out, visibility 180ms ease-in-out;
}

.drawer-backdrop.is-open {
    opacity: 1;
    visibility: visible;
}

/* ============================================================
 * Bottom Navigation
 * ============================================================
 */
.bottom-nav {
    display: none;
}

/* ============================================================
 * Responsive
 * ============================================================
 */
@media (max-width: 860px) {
    .desktop-nav {
        display: none;
    }

    .mobile-menu-button {
        display: inline-flex;
    }

    .hero-panel {
        grid-template-columns: 1fr;
    }

    .hero-copy,
    .foundation-card {
        padding: 24px;
    }

    .bottom-nav {
        position: fixed;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 45;
        background: var(--color-white);
        border-top: 1px solid var(--color-border);
        box-shadow: 0 -8px 24px rgba(17, 24, 39, 0.08);
    }

    .bottom-nav a {
        min-height: 58px;
        display: grid;
        place-items: center;
        font-size: 12px;
        color: var(--color-text-grey);
        font-weight: 800;
    }

    .bottom-nav a.active {
        color: var(--color-main-blue);
    }
}

@media (max-width: 520px) {
    .topbar-inner {
        min-height: 58px;
        padding: 0 14px;
    }

    .brand-mark {
        width: 32px;
        height: 32px;
    }

    .brand-text {
        font-size: 15px;
    }

    .page-shell {
        padding: 22px 14px 86px;
    }

    .hero-copy h1 {
        font-size: 34px;
    }

    .hero-copy p {
        font-size: 16px;
    }

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

    .hero-actions {
        display: grid;
    }

    .btn {
        width: 100%;
    }
}