/* ============================================================
   FileSharingPortal — Glassmorphism Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:wght@300;400;500&display=swap');

/* --- CSS Variables --- */
:root {
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);
    --blur: blur(12px);
    --accent: #7c5cbf;
    --accent2: #4fc3f7;
    --accent3: #f06292;
    --text-primary: #f0f0f0;
    --text-secondary: rgba(240,240,240,0.65);
    --success: #66bb6a;
    --error: #ef5350;
    --warning: #ffa726;
    --radius: 18px;
    --radius-sm: 10px;
}

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

body {
    font-family: 'DM Sans', sans-serif;
    background: #0a0a1a;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

    /* --- Animated Background --- */
    body::before {
        content: '';
        position: fixed;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(ellipse at 20% 20%, rgba(124,92,191,0.35) 0%, transparent 50%), radial-gradient(ellipse at 80% 80%, rgba(79,195,247,0.25) 0%, transparent 50%), radial-gradient(ellipse at 60% 30%, rgba(240,98,146,0.2) 0%, transparent 45%);
        animation: bgShift 12s ease-in-out infinite alternate;
        z-index: -1;
    }

@keyframes bgShift {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    100% {
        transform: translate(2%, 2%) rotate(3deg);
    }
}

/* --- Glass Card --- */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

    .glass-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 16px 40px rgba(0,0,0,0.45);
    }

/* --- Navigation Bar --- */
.navbar {
    background: rgba(10, 10, 30, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar-brand {
    font-family: 'Syne', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent2), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}

    .navbar-nav a {
        color: var(--text-secondary);
        text-decoration: none;
        padding: 0.5rem 1.1rem;
        border-radius: 50px;
        font-size: 0.9rem;
        font-weight: 500;
        transition: all 0.25s ease;
        border: 1px solid transparent;
    }

        .navbar-nav a:hover {
            color: var(--text-primary);
            background: var(--glass-bg);
            border-color: var(--glass-border);
        }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    border-radius: 50px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #9b7de8);
    color: #fff;
    box-shadow: 0 4px 20px rgba(124,92,191,0.45);
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(124,92,191,0.6);
    }

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

    .btn-secondary:hover {
        background: rgba(255,255,255,0.14);
    }

.btn-danger {
    background: linear-gradient(135deg, #ef5350, #e53935);
    color: #fff;
    box-shadow: 0 4px 16px rgba(239,83,80,0.35);
}

    .btn-danger:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(239,83,80,0.5);
    }

.btn-success {
    background: linear-gradient(135deg, #66bb6a, #43a047);
    color: #fff;
    box-shadow: 0 4px 16px rgba(102,187,106,0.35);
}

    .btn-success:hover {
        transform: translateY(-2px);
    }

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.82rem;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 1.4rem;
}

    .form-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-size: 0.85rem;
        color: var(--text-secondary);
        font-weight: 500;
        letter-spacing: 0.3px;
    }

.form-control {
    width: 100%;
    padding: 0.75rem 1.1rem;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    transition: border-color 0.25s ease, background 0.25s ease;
    outline: none;
}

    .form-control:focus {
        border-color: var(--accent);
        background: rgba(255,255,255,0.1);
        box-shadow: 0 0 0 3px rgba(124,92,191,0.2);
    }

    .form-control::placeholder {
        color: rgba(240,240,240,0.3);
    }

select.form-control option {
    background: #1a1a2e;
    color: var(--text-primary);
}

/* --- File Upload Drop Zone --- */
.upload-zone {
    border: 2px dashed rgba(255,255,255,0.2);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(124,92,191,0.06);
}

    .upload-zone:hover {
        border-color: var(--accent);
        background: rgba(124,92,191,0.12);
    }

    .upload-zone .upload-icon {
        font-size: 3.5rem;
        margin-bottom: 1rem;
        opacity: 0.7;
    }

    .upload-zone p {
        color: var(--text-secondary);
        font-size: 0.95rem;
    }

/* --- Page Layout --- */
.page-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.page-header {
    margin-bottom: 2.5rem;
}

    .page-header h1 {
        font-family: 'Syne', sans-serif;
        font-size: 2.2rem;
        font-weight: 800;
        background: linear-gradient(135deg, #fff 40%, var(--accent2));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 0.4rem;
    }

    .page-header p {
        color: var(--text-secondary);
        font-size: 0.95rem;
    }

/* --- Dashboard Stats Grid --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--blur);
    border-radius: var(--radius);
    padding: 1.6rem;
    text-align: center;
    transition: transform 0.3s ease;
}

    .stat-card:hover {
        transform: translateY(-4px);
    }

    .stat-card .stat-icon {
        font-size: 2.4rem;
        margin-bottom: 0.75rem;
    }

    .stat-card .stat-number {
        font-family: 'Syne', sans-serif;
        font-size: 2rem;
        font-weight: 800;
        color: var(--text-primary);
        line-height: 1;
    }

    .stat-card .stat-label {
        font-size: 0.82rem;
        color: var(--text-secondary);
        margin-top: 0.4rem;
    }

/* --- File Table --- */
.files-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

    .files-table thead th {
        text-align: left;
        padding: 1rem 1.2rem;
        color: var(--text-secondary);
        font-weight: 600;
        border-bottom: 1px solid var(--glass-border);
        font-size: 0.8rem;
        text-transform: uppercase;
        letter-spacing: 0.8px;
    }

    .files-table tbody tr {
        border-bottom: 1px solid rgba(255,255,255,0.06);
        transition: background 0.2s ease;
    }

        .files-table tbody tr:hover {
            background: rgba(255,255,255,0.04);
        }

    .files-table tbody td {
        padding: 1rem 1.2rem;
        color: var(--text-primary);
        vertical-align: middle;
    }

/* --- File Type Badge --- */
.file-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-pdf {
    background: rgba(239,83,80,0.2);
    color: #ef5350;
}

.badge-docx {
    background: rgba(79,195,247,0.2);
    color: #4fc3f7;
}

.badge-zip {
    background: rgba(255,167,38,0.2);
    color: #ffa726;
}

.badge-image {
    background: rgba(102,187,106,0.2);
    color: #66bb6a;
}

.badge-other {
    background: rgba(255,255,255,0.1);
    color: #ccc;
}

/* --- Alerts --- */
.alert {
    padding: 0.9rem 1.3rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: rgba(102,187,106,0.15);
    border: 1px solid rgba(102,187,106,0.35);
    color: #a5d6a7;
}

.alert-error {
    background: rgba(239,83,80,0.15);
    border: 1px solid rgba(239,83,80,0.35);
    color: #ef9a9a;
}

.alert-info {
    background: rgba(79,195,247,0.15);
    border: 1px solid rgba(79,195,247,0.35);
    color: #81d4fa;
}

/* --- Auth Pages (Login, Register) --- */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 440px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 2.5rem;
}

    .auth-logo h2 {
        font-family: 'Syne', sans-serif;
        font-size: 1.8rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--accent2), var(--accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .auth-logo p {
        color: var(--text-secondary);
        font-size: 0.9rem;
        margin-top: 0.4rem;
    }

/* --- Hero Section (Home) --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

    .hero h1 {
        font-family: 'Syne', sans-serif;
        font-size: clamp(3rem, 8vw, 6rem);
        font-weight: 800;
        line-height: 1.05;
        background: linear-gradient(135deg, #fff 30%, var(--accent2) 60%, var(--accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 1.5rem;
    }

    .hero p {
        max-width: 520px;
        color: var(--text-secondary);
        font-size: 1.1rem;
        line-height: 1.7;
        margin-bottom: 2.5rem;
    }

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* --- Features Grid --- */
.features-grid {
    display: grid;
    /*    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));*/
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 5rem auto 0;
    padding: 0 1.5rem;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--blur);
    border-radius: var(--radius);
    padding: 1.8rem;
    text-align: center;
    transition: transform 0.3s ease;
}

    .feature-card:hover {
        transform: translateY(-5px);
       
    }

    .feature-card .feat-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }

    .feature-card h3 {
        font-family: 'Syne', sans-serif;
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .feature-card p {
        font-size: 0.88rem;
        color: var(--text-secondary);
        line-height: 1.6;
    }




/* --- Utilities --- */
.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.w-100 {
    width: 100%;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
}

/* --- Responsive --- */
/*@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.2rem;
    }

    .navbar-nav {
        gap: 0.2rem;
    }

        .navbar-nav a {
            padding: 0.4rem 0.7rem;
            font-size: 0.82rem;
        }

    .page-wrapper {
        padding: 1.5rem 1rem;
    }

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

    .files-table thead {
        display: none;
    }

    .files-table tbody tr {
        display: block;
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .files-table tbody td {
        display: block;
        padding: 0.4rem 0;
    }
}
*/


/* 
   RESPONSIVE DESIGN — Desktop / Tablet / Mobile */

/* Hamburger button — hidden on desktop */
.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 7px 9px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    transition: background 0.2s;
}

    .nav-hamburger:hover {
        background: rgba(255,255,255,0.12);
    }

    .nav-hamburger span {
        display: block;
        width: 21px;
        height: 2px;
        background: var(--text-primary);
        border-radius: 2px;
    }

/* Tablet — 992px */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .page-wrapper {
        padding: 1.8rem 1.2rem;
    }
}

/* Mobile — 768px */
@media (max-width: 768px) {

    /* Navbar */
    .navbar {
        padding: 0.85rem 1.1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }

    .nav-hamburger {
        display: flex;
    }

    /* Nav links collapse */
    .navbar-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.25rem;
        padding: 0.6rem 0;
        border-top: 1px solid var(--glass-border);
    }

        .navbar-nav.nav-open {
            display: flex;
        }

        .navbar-nav a, .navbar-nav li {
            width: 100%;
        }

        .navbar-nav a {
            padding: 0.55rem 0.9rem;
            border-radius: 8px;
            display: block;
        }

    /* Page layout */
    .page-wrapper {
        padding: 1.1rem 0.85rem;
    }

    .page-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 1rem;
    }

        .page-header h1 {
            font-size: 1.55rem;
        }

    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.7rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-number {
        font-size: 1.5rem !important;
    }

    /* Feature + features-grid */
    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 0.92rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

        .hero-buttons .btn {
            width: 100%;
            max-width: 280px;
            justify-content: center;
        }

    /* Glass card */
    .glass-card {
        padding: 1.1rem;
        border-radius: 14px;
    }

    /* Auth */
    .auth-container {
        padding: 1rem;
        align-items: flex-start;
        padding-top: 1.5rem;
    }

    /* File table → card layout on mobile */
    .files-table {
        display: block;
    }

        .files-table thead {
            display: none;
        }

        .files-table tbody {
            display: block;
        }

            .files-table tbody tr {
                display: block;
                background: rgba(255,255,255,0.03);
                border: 1px solid var(--glass-border);
                border-radius: var(--radius-sm);
                padding: 0.9rem;
                margin-bottom: 0.65rem;
            }

            .files-table tbody td {
                display: flex;
                justify-content: space-between;
                align-items: center;
                padding: 0.28rem 0;
                font-size: 0.87rem;
                border-bottom: 1px solid rgba(255,255,255,0.04);
            }

                .files-table tbody td:last-child {
                    border-bottom: none;
                    padding-top: 0.7rem;
                    justify-content: flex-end;
                }

    /* Buttons */
    .btn {
        font-size: 0.83rem;
        padding: 0.52rem 0.95rem;
    }

    .d-flex.gap-1 {
        flex-wrap: wrap;
    }

    /* Share grid on SharedFiles */
    [style*="grid-template-columns:1fr 1fr auto"] {
        display: flex !important;
        flex-direction: column !important;
    }

    /* Password rules */
    #pwRules, [style*="grid-template-columns:1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
}

/* Small mobile — 480px */
@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero h1 {
        font-size: 1.9rem;
    }

    .glass-card {
        padding: 0.9rem;
    }

    .auth-logo h2 {
        font-size: 1.4rem;
    }

    .otp-wrap {
        gap: 0.4rem;
    }

    .otp-box {
        width: 42px;
        height: 50px;
        font-size: 1.4rem;
    }
}