@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');

/* Design System: Material Design 3 (Indigo) */

:root,
:root[data-theme="dark"] {
    /* Indigo primary — filled button stays a strong indigo in both themes */
    --primary: #aab4ff;              /* accent for text / links / icons (light indigo on dark) */
    --btn-primary-bg: #3f51b5;
    --btn-primary-hover: #4a5cc4;
    --on-primary: #ffffff;

    --bg-primary: #101218;           /* app background */
    --bg-secondary: #1a1d27;         /* surface / cards */
    --surface-variant: #242835;      /* filled fields, chips */

    --text-primary: #e4e6ee;
    --text-secondary: #c2c5d0;
    --text-muted: #8d909c;

    --glass-bg: #1a1d27;             /* card surface (legacy name) */
    --glass-border: #333747;         /* outline */
    --glass-border-focus: #aab4ff;
    --divider: #2a2d3a;
    --surface-hover: rgba(255, 255, 255, 0.06);
    --table-row-hover: rgba(255, 255, 255, 0.04);
    --th-bg: rgba(255, 255, 255, 0.03);
    --input-bg: #242835;

    --danger: #ef5350;
    --success: #66bb6a;

    --modal-overlay: rgba(0, 0, 0, 0.6);
    --qr-bg: #ffffff;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.40), 0 2px 6px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.45), 0 4px 12px rgba(0, 0, 0, 0.40);
    --shadow-glow: 0 0 0 3px rgba(170, 180, 255, 0.20);

    /* Legacy aliases still referenced by rules/inline styles */
    --accent-blue: var(--primary);
    --accent-purple: #b39ddb;
    --accent-gradient: var(--primary);
    --accent-purple-gradient: #b39ddb;

    --font-sans: 'Roboto', system-ui, -apple-system, "Segoe UI", sans-serif;
    --radius-card: 16px;
    --radius-btn: 20px;
}

/* Light theme overrides */
:root[data-theme="light"] {
    --primary: #3f51b5;
    --btn-primary-bg: #3f51b5;
    --btn-primary-hover: #37469e;
    --on-primary: #ffffff;

    --bg-primary: #f4f5fb;
    --bg-secondary: #ffffff;
    --surface-variant: #eceef7;

    --text-primary: #1a1c22;
    --text-secondary: #44464f;
    --text-muted: #74777f;

    --glass-bg: #ffffff;
    --glass-border: #d6d8e2;
    --glass-border-focus: #3f51b5;
    --divider: #e6e7ee;
    --surface-hover: rgba(63, 81, 181, 0.06);
    --table-row-hover: rgba(63, 81, 181, 0.04);
    --th-bg: rgba(0, 0, 0, 0.03);
    --input-bg: #eef0f7;

    --danger: #d32f2f;
    --success: #2e7d32;

    --modal-overlay: rgba(0, 0, 0, 0.45);

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.10), 0 4px 10px rgba(0, 0, 0, 0.14);
    --shadow-glow: 0 0 0 3px rgba(63, 81, 181, 0.16);

    --accent-purple: #7c4dff;
    --accent-purple-gradient: #7c4dff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Auth Page Layout */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 40px;
    width: 100%;
    max-width: 450px;
    box-shadow: var(--shadow-card);
    animation: fadeIn 0.4s ease forwards;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
    letter-spacing: -0.25px;
}

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

/* Form */
.form-group { margin-bottom: 22px; }

.form-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    margin-bottom: 8px;
}

.input-control {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.input-control::placeholder { color: var(--text-muted); }

.input-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--btn-primary-bg);
    color: var(--on-primary);
    box-shadow: var(--shadow-card);
}
.btn-primary:hover {
    background: var(--btn-primary-hover);
    box-shadow: var(--shadow-hover);
}
.btn-primary:active { box-shadow: var(--shadow-card); }

.btn-secondary {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--primary);
}
.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--primary);
}

.btn-block { width: 100%; }

.btn-sm {
    padding: 7px 16px;
    font-size: 0.82rem;
}

.btn-danger {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--danger);
}
.btn-danger:hover {
    background: rgba(211, 47, 47, 0.08);
    border-color: var(--danger);
}

.auth-footer {
    text-align: center;
    margin-top: 28px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.auth-footer a { color: var(--primary); text-decoration: none; font-weight: 500; }
.auth-footer a:hover { text-decoration: underline; }

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: fadeIn 0.3s ease;
}
.alert-success {
    background: rgba(46, 125, 50, 0.12);
    border: 1px solid rgba(46, 125, 50, 0.35);
    color: var(--success);
}
.alert-danger {
    background: rgba(211, 47, 47, 0.12);
    border: 1px solid rgba(211, 47, 47, 0.35);
    color: var(--danger);
}

/* App Container */
.app-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px 60px 20px;
    flex: 1;
}

/* Top App Bar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    margin-bottom: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--primary); }
.brand svg { color: var(--primary); }
.brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.25px;
}

.user-menu { display: flex; align-items: center; gap: 16px; }
.user-info { color: var(--text-secondary); font-size: 0.9rem; }
.user-info strong { color: var(--text-primary); font-weight: 500; }

/* Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 120px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
    background: var(--primary);
}
.stat-card.purple::before { background: var(--accent-purple); }

.stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}
.stat-val {
    font-size: 2.2rem;
    font-weight: 700;
    margin-top: 10px;
    color: var(--primary);
}
.stat-card.purple .stat-val { color: var(--accent-purple); }

/* Creation Panel */
.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 28px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-card);
}
.panel h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}
.panel h3 svg { color: var(--primary); }

.panel-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 16px;
    align-items: end;
}
@media (max-width: 900px) {
    .panel-row { grid-template-columns: 1fr; }
    .panel-row .btn { margin-top: 10px; width: 100%; }
}

/* Links Section */
.section-header { margin-bottom: 18px; }
.section-header h3 { font-size: 1.25rem; font-weight: 500; color: var(--text-primary); }

.links-list { display: flex; flex-direction: column; gap: 14px; }

.link-item {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    box-shadow: var(--shadow-card);
}
.link-item:hover {
    border-color: var(--glass-border-focus);
    box-shadow: var(--shadow-hover);
}

.link-details { flex: 1; min-width: 0; padding-right: 20px; }
.link-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.link-short-wrapper { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.link-short { font-size: 1.05rem; color: var(--primary); text-decoration: none; font-weight: 500; }
.link-short:hover { text-decoration: underline; }

.copy-badge {
    background: var(--surface-variant);
    color: var(--primary);
    border: 1px solid var(--glass-border);
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 0.72rem;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s ease;
}
.copy-badge:hover { background: var(--surface-hover); }

.link-original {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block;
}
.link-meta {
    display: flex; align-items: center; gap: 16px;
    color: var(--text-muted); font-size: 0.8rem; margin-top: 8px;
}

.link-clicks-indicator {
    background: var(--surface-variant);
    border-radius: 12px;
    padding: 8px 14px;
    text-align: center;
    margin-right: 20px;
}
.clicks-count { display: block; font-size: 1.4rem; font-weight: 700; color: var(--text-primary); }
.clicks-lbl { font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.3px; }

.link-actions { display: flex; align-items: center; gap: 10px; }

@media (max-width: 768px) {
    .link-item { flex-direction: column; align-items: stretch; gap: 16px; }
    .link-details { padding-right: 0; }
    .link-clicks-indicator { margin-right: 0; margin-top: 10px; text-align: left; }
    .link-actions { justify-content: flex-end; flex-wrap: wrap; }
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--modal-overlay);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
    background: var(--bg-secondary);
    border-radius: 28px;
    padding: 28px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-hover);
    text-align: center;
    transform: translateY(16px) scale(0.98);
    transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal h3 { margin-bottom: 20px; font-size: 1.2rem; font-weight: 500; color: var(--text-primary); }

.qr-image-container {
    background: var(--qr-bg);
    border-radius: 12px;
    padding: 16px;
    display: inline-block;
    margin-bottom: 20px;
}
.qr-image-container img { display: block; width: 200px; height: 200px; }

.modal-footer { display: flex; justify-content: center; gap: 12px; }

/* Analytics */
.back-header { display: flex; align-items: center; gap: 15px; margin-bottom: 28px; }
.back-link {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.back-link:hover { background: var(--surface-hover); border-color: var(--primary); color: var(--primary); }

.analytics-link-bar {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 24px;
    margin-bottom: 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-card);
}
.analytics-link-info h2 { font-size: 1.35rem; font-weight: 500; margin-bottom: 4px; color: var(--text-primary); }
.analytics-link-info a { color: var(--primary); text-decoration: none; font-size: 1.05rem; font-weight: 500; }
.analytics-link-info a:hover { text-decoration: underline; }

.analytics-charts-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; margin-bottom: 28px; }
.analytics-charts-subgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .analytics-charts-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .analytics-charts-subgrid { grid-template-columns: 1fr; } }

.chart-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 24px;
    box-shadow: var(--shadow-card);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.chart-card h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-weight: 500;
}
.chart-container {
    position: relative; flex: 1;
    min-height: 250px; max-height: 350px;
    display: flex; align-items: center; justify-content: center;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}
.data-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
.data-table th {
    background: var(--th-bg);
    color: var(--text-secondary);
    font-weight: 500;
    padding: 16px 24px;
    border-bottom: 1px solid var(--glass-border);
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.5px;
}
.data-table td { padding: 16px 24px; border-bottom: 1px solid var(--divider); color: var(--text-primary); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--table-row-hover); }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 56px 40px;
    background: var(--bg-secondary);
    border: 1px dashed var(--glass-border);
    border-radius: var(--radius-card);
}
.empty-state p { color: var(--text-secondary); margin-bottom: 20px; font-size: 1.05rem; }

/* Toast (Snackbar) */
.toast {
    position: fixed;
    bottom: 30px;
    right: -400px;
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary);
    border-top: 1px solid var(--glass-border);
    border-right: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
    z-index: 1000;
    font-weight: 500;
    font-size: 0.92rem;
    transition: right 0.35s cubic-bezier(0.2, 0, 0, 1);
    display: flex; align-items: center; gap: 12px;
}
.toast.show { right: 30px; }

/* Theme toggle (Material icon button) */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    padding: 0;
}
.theme-toggle:hover { color: var(--primary); background: var(--surface-hover); }
.theme-toggle svg { width: 22px; height: 22px; }

/* Light mode: offer the moon (switch to dark). Dark mode: offer the sun. */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.theme-toggle--floating {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 50;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-card);
}