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

:root {
    --bg-gradient-start: #0a1628;
    --bg-gradient-end: #1a1a3e;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-bg-dark: rgba(30, 41, 59, 0.95);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #f8fafc;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-orange: #f97316;
    --accent-cyan: #06b6d4;
    --border-light: rgba(255, 255, 255, 0.1);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-btn: 0 4px 15px rgba(59, 130, 246, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    background-attachment: fixed;
}

nav.main-nav {
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-light);
}

nav.main-nav .nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

nav.main-nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s;
}

nav.main-nav a:hover {
    color: var(--accent-blue);
}

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    color: var(--text-light);
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.75rem;
    margin-top: 2rem;
}

.flash {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.flash.success {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid var(--accent-green);
    color: #86efac;
}

.flash.error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--accent-red);
    color: #fca5a5;
}

.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    text-decoration: none;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-btn);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-red) 0%, #dc2626 100%);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-secondary {
    background: rgba(100, 116, 139, 0.5);
    box-shadow: none;
}

.btn-secondary:hover {
    background: rgba(100, 116, 139, 0.7);
    box-shadow: 0 4px 15px rgba(100, 116, 139, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--accent-green) 0%, #16a34a 100%);
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

.btn-refresh {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #7c3aed 100%);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-refresh:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #0891b2 100%);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-info:hover {
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

th, td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

th {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-light);
    font-weight: 600;
}

tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

tr:last-child td {
    border-bottom: none;
}

form.main-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    max-width: 600px;
    box-shadow: var(--shadow-card);
}

.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    background: #fff;
    color: var(--text-primary);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

input[type="checkbox"] {
    margin-right: 0.5rem;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-blue);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
}

.actions {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
    color: var(--text-primary);
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-secondary);
}

.lottery-list {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

.lottery-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.lottery-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.lottery-info h3 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.lottery-info h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
}

.lottery-info h3 a:hover {
    color: var(--accent-blue);
}

.lottery-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.lottery-actions {
    display: flex;
    gap: 0.5rem;
}

.numbers-input {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.numbers-input input {
    width: 70px;
    text-align: center;
}

.draw-section {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(59, 130, 246, 0.1);
}

.draw-section h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.analysis-section {
    margin-top: 2rem;
}

.analysis-section h2 {
    border-bottom: 3px solid var(--accent-blue);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

.freq-table td:first-child {
    font-weight: 700;
}

.hot {
    color: var(--accent-red);
}

.cold {
    color: var(--accent-blue);
}

.number-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-radius: 50%;
    margin: 2px;
    font-size: 0.85rem;
    font-weight: 600;
}

.number-badge.bonus {
    background: linear-gradient(135deg, var(--accent-red) 0%, #dc2626 100%);
}

.number-badge.second-drum {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #7c3aed 100%);
}

.number-badge.hot {
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-orange) 100%);
}

.number-badge.cold {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
}

.number-badge.rising {
    background: linear-gradient(135deg, var(--accent-green) 0%, #16a34a 100%);
}

.number-badge.falling {
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-red) 100%);
}

.number-badge.superhot {
    background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 10px rgba(239, 68, 68, 0.5); }
    50% { box-shadow: 0 0 20px rgba(239, 68, 68, 0.8); }
}

.number-badge.small {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.import-info {
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.import-info pre {
    background: rgba(0, 0, 0, 0.05);
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.9rem;
    border-radius: 8px;
    margin-top: 0.5rem;
}

.card.highlight {
    border: 2px solid var(--accent-blue);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%), var(--card-bg);
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.strategy-grid h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.dist-tables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.dist-tables h4 {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

details {
    margin-top: 1rem;
}

summary {
    cursor: pointer;
    padding: 0.75rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 10px;
    font-weight: 600;
    transition: background 0.3s;
    color: var(--text-primary);
}

summary:hover {
    background: rgba(59, 130, 246, 0.2);
}

.full-freq {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.full-freq td, .full-freq th {
    padding: 0.5rem 0.75rem;
}

.recommended-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.recommended-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.recommended-list li:last-child {
    border-bottom: none;
}

.sticky-nav {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    padding: 1rem 1.5rem;
    margin: 0 0 1.5rem 0;
    z-index: 100;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    flex-wrap: wrap;
    border-radius: 12px;
    border: 1px solid var(--border-light);
}

.sticky-nav .nav-link {
    padding: 0.6rem 1.2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    text-decoration: none;
    color: var(--text-light);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.sticky-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.5rem;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    min-width: 220px;
    z-index: 200;
    overflow: hidden;
}

.nav-dropdown:hover .dropdown-content {
    display: block;
    animation: dropdownFade 0.2s ease;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-content a {
    display: block;
    padding: 0.75rem 1.2rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    padding-left: 1.5rem;
}

.btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    line-height: 1;
    border-radius: 8px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-sm.btn-secondary {
    background: var(--accent-blue);
    color: #fff;
}

.btn-sm.btn-secondary:hover {
    background: var(--accent-purple);
    transform: scale(1.05);
}

.btn-sm.btn-danger {
    background: var(--accent-red);
    color: #fff;
}

.btn-sm.btn-danger:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.actions-cell {
    white-space: nowrap;
    width: 100px;
    text-align: center;
}

.draws-table {
    width: 100%;
}

.draws-table td, .draws-table th {
    vertical-align: middle;
}

[id] {
    scroll-margin-top: 80px;
}

.period-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.period-tab {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--accent-blue);
    background: transparent;
    color: var(--accent-blue);
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.period-tab:hover {
    background: rgba(59, 130, 246, 0.1);
}

.period-tab.active {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    border-color: transparent;
}

.period-content {
    display: none;
}

.period-content.active {
    display: block;
}

.period-info {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.ticket-form {
    max-width: none;
    padding: 0;
    background: none;
    box-shadow: none;
}

.form-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-row .form-group {
    margin-bottom: 0;
}

.form-row select {
    width: 180px;
}

.form-row label {
    color: var(--text-primary);
}

.tickets-section {
    display: grid;
    gap: 1rem;
}

.ticket-card {
    overflow-x: auto;
}

.ticket-table {
    width: auto;
    min-width: 100%;
}

.ticket-table th, .ticket-table td {
    text-align: center;
    padding: 0.5rem;
    white-space: nowrap;
}

.ticket-table th:first-child, .ticket-table td:first-child {
    background: rgba(59, 130, 246, 0.1);
    font-weight: 700;
}

.column-num {
    width: 40px;
}

.system-card {
    border: 2px solid var(--accent-green);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(22, 163, 74, 0.05) 100%), var(--card-bg);
}

.system-info {
    margin: 1rem 0;
}

.system-stats {
    margin-top: 0.5rem;
    font-size: 1.1rem;
    color: var(--accent-green);
    font-weight: 600;
}

.combinations-table {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.combinations-table th, .combinations-table td {
    padding: 0.3rem 0.5rem;
    text-align: center;
}

.separator {
    width: 10px;
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.2) 0%, rgba(139, 92, 246, 0.1) 50%, rgba(139, 92, 246, 0.2) 100%);
    border-left: 2px solid var(--accent-purple);
    border-right: 2px solid var(--accent-purple);
}

.second-drum-header {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #7c3aed 100%) !important;
    color: #fff;
}

.test-results {
    border: 2px solid var(--accent-blue);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%), var(--card-bg);
}

.test-summary {
    background: rgba(59, 130, 246, 0.1);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.draw-stats {
    margin: 1rem 0;
}

.stats-table {
    width: auto;
    margin-bottom: 1rem;
}

.stats-table th, .stats-table td {
    padding: 0.5rem 1rem;
}

.test-table {
    width: 100%;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.test-table th, .test-table td {
    padding: 0.5rem;
}

.hit-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green) 0%, #16a34a 100%);
    color: #fff;
    padding: 3px 8px;
    border-radius: 6px;
    margin: 2px;
    font-size: 0.85rem;
    font-weight: 600;
}

.hit-badge.hit-high {
    background: linear-gradient(135deg, var(--accent-red) 0%, #dc2626 100%);
}

.drawn-numbers {
    font-size: 0.85rem;
    max-width: 300px;
}

.custom-test {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%), var(--card-bg);
}

.custom-numbers-display {
    background: rgba(6, 182, 212, 0.1);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.custom-numbers-display p {
    margin: 0.25rem 0;
}

.second-drum-col {
    color: var(--accent-purple);
    font-weight: 700;
}

.chart-card {
    margin-bottom: 1.5rem;
}

.chart-container {
    overflow-x: auto;
    text-align: center;
    padding: 1rem 0;
}

.chart-container img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.chart-description {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

@media (max-width: 1024px) {
    main {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    .lottery-list {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    main {
        padding: 1rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .card {
        padding: 1.25rem;
        border-radius: 12px;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .actions {
        flex-direction: column;
    }

    .actions .btn {
        width: 100%;
        text-align: center;
    }

    .lottery-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .lottery-actions {
        width: 100%;
    }

    .lottery-actions .btn {
        flex: 1;
        text-align: center;
    }

    form {
        padding: 1.25rem;
    }

    .form-row {
        flex-direction: column;
    }

    .form-row select {
        width: 100%;
    }

    .sticky-nav {
        padding: 0.75rem;
        gap: 0.25rem;
        margin: 0 0 1rem 0;
        border-radius: 10px;
    }

    .sticky-nav .nav-link {
        padding: 0.5rem 0.8rem;
        font-size: 0.8rem;
    }

    .period-tabs {
        gap: 0.25rem;
    }

    .period-tab {
        padding: 0.5rem 0.8rem;
        font-size: 0.8rem;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.625rem 0.5rem;
    }

    .number-badge {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }

    .dist-tables {
        grid-template-columns: 1fr;
    }

    .nav-dropdown .dropdown-content {
        position: fixed;
        left: 1rem;
        right: 1rem;
        top: auto;
        width: auto;
    }
}

.danger-zone {
    border: 2px solid var(--accent-red);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(220, 38, 38, 0.05) 100%), var(--card-bg);
    margin-top: 2rem;
}

.danger-zone h3 {
    color: var(--accent-red);
}

@media (max-width: 480px) {
    main {
        padding: 0.75rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 1rem;
    }

    .numbers-input input {
        width: 55px;
    }

    .ticket-table {
        font-size: 0.85rem;
    }

    .ticket-table th, .ticket-table td {
        padding: 0.375rem;
    }
}

nav.main-nav .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--accent-red);
    color: #fff;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-unread {
    background: var(--accent-orange);
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card .form-group {
    margin-bottom: 1.5rem;
}

.btn-block {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
}

.profile-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.profile-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.chat-section .card {
    height: fit-content;
}

.chat-messages {
    max-height: 400px;
    overflow-y: auto;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.02);
    border-radius: 12px;
    margin-bottom: 1rem;
}

.chat-message {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    max-width: 85%;
}

.chat-message.sent {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    margin-left: auto;
}

.chat-message.received {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-primary);
}

.message-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.message-author {
    font-weight: 600;
}

.message-content {
    word-wrap: break-word;
}

.message-actions {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
}

.chat-message.sent .message-actions .btn {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.no-messages {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

.chat-form {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.chat-form .form-group {
    flex: 1;
    margin-bottom: 0;
}

.chat-form textarea {
    resize: none;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 1rem;
}

.messages-list {
    display: grid;
    gap: 1rem;
}

.message-user-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.message-user-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.chat-card {
    max-width: 800px;
}

.flash.warning {
    background: rgba(251, 191, 36, 0.2);
    border: 1px solid rgba(251, 191, 36, 0.5);
    color: #fbbf24;
}

.flash.info {
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid var(--accent-blue);
    color: #93c5fd;
}

.flash.danger {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--accent-red);
    color: #fca5a5;
}

@media (max-width: 768px) {
    .profile-container {
        grid-template-columns: 1fr;
    }

    .nav-links {
        gap: 0.75rem;
    }

    .nav-links a {
        font-size: 0.85rem;
    }

    .login-card {
        margin: 1rem;
        padding: 1.5rem;
    }

    .chat-messages {
        max-height: 300px;
    }
}

.help-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    border: none;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    transition: all 0.3s ease;
    z-index: 900;
}

.help-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.5);
}

.help-modal-content {
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(59, 130, 246, 0.2);
}

.modal-header h2 {
    margin: 0;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--accent-red);
}

.modal-body {
    color: var(--text-primary);
    line-height: 1.7;
}

.modal-body h4 {
    color: var(--accent-blue);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.modal-body h4:first-child {
    margin-top: 0;
}

.modal-body p {
    margin-bottom: 0.75rem;
}

.modal-body ul {
    margin: 0.5rem 0 1rem 1.5rem;
    color: var(--text-secondary);
}

.modal-body li {
    margin-bottom: 0.5rem;
}

.modal-body strong {
    color: var(--accent-purple);
}

#help-modal {
    display: none;
}

@media (max-width: 768px) {
    .help-btn {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }

    .help-modal-content {
        width: 95%;
        max-height: 85vh;
        padding: 1.5rem;
    }

    .modal-header h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .help-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .help-modal-content {
        padding: 1rem;
    }

    .modal-body {
        font-size: 0.95rem;
    }
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
    nav.main-nav {
        padding: 0.75rem 1rem;
    }

    nav.main-nav .nav-container {
        padding: 0;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .nav-brand {
        font-size: 1rem;
    }
}