/* ══════════════════════════════════════════════════════════════════
   Student Database Management System — Premium Dark Theme
   Course: CSE 124 - Data Structure Lab
   Institution: Daffodil International University
   ══════════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties (Design Tokens) ── */
:root {
    /* Colors */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.75);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --bg-sidebar: rgba(10, 14, 23, 0.95);
    --bg-input: rgba(30, 41, 59, 0.6);

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #6366f1;
    --accent-primary-hover: #818cf8;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.15);

    --border: rgba(148, 163, 184, 0.1);
    --border-focus: rgba(99, 102, 241, 0.5);

    /* Sizing */
    --sidebar-width: 260px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);

    /* 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 {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ══════════════════════════════════════════════════════════════
   ANIMATED BACKGROUND
   ══════════════════════════════════════════════════════════════ */

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.bg-orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #6366f1, transparent 70%);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.bg-orb-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #8b5cf6, transparent 70%);
    bottom: -80px;
    left: -80px;
    animation-delay: -7s;
}

.bg-orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #3b82f6, transparent 70%);
    top: 40%;
    left: 50%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -60px) scale(1.1); }
    50% { transform: translate(-30px, 40px) scale(0.95); }
    75% { transform: translate(50px, 20px) scale(1.05); }
}

/* ══════════════════════════════════════════════════════════════
   LANDING PAGE
   ══════════════════════════════════════════════════════════════ */

.landing-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.landing-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 600px;
    padding: 20px;
    animation: fadeInUp 0.8s ease-out;
}

.landing-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 50px 40px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

/* Logo */
.logo-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 30px;
}

.logo-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--accent-gradient);
    border-radius: 50%;
    filter: blur(30px);
    opacity: 0.4;
    animation: pulse 3s infinite ease-in-out;
}

.logo {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: contain;
    z-index: 1;
}

/* Typography */
.landing-title {
    margin-bottom: 12px;
}

.title-line {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.landing-course {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

/* Enter Button */
.btn-enter {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    background: var(--accent-gradient);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-enter:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

.btn-enter:active {
    transform: translateY(0);
}

/* Team Section */
.team-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.team-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.team-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.team-member {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 14px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
    min-width: 140px;
}

.team-member:hover {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.member-id {
    font-size: 0.7rem;
    color: var(--accent-primary);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.member-name {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
}

.member-badge {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--success);
    background: var(--success-bg);
    padding: 2px 8px;
    border-radius: 12px;
    margin-top: 2px;
}

/* ══════════════════════════════════════════════════════════════
   DASHBOARD PAGE LAYOUT
   ══════════════════════════════════════════════════════════════ */

.dashboard-page {
    display: flex;
}

/* ── Sidebar ── */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    padding: 20px 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px 30px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 10px;
}

.sidebar-logo {
    width: 44px;
    height: 44px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sidebar-nav {
    flex: 1;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    text-decoration: none;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary-hover);
}

.nav-item.active svg {
    color: var(--accent-primary);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* ── Main Content Area ── */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 30px 40px;
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ── Sections ── */
.section {
    display: none;
    animation: fadeInUp 0.4s ease-out;
}

.section.active {
    display: block;
}

.section-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 16px;
}

.section-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ══════════════════════════════════════════════════════════════
   STATS CARDS
   ══════════════════════════════════════════════════════════════ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all var(--transition-base);
}

.stat-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-blue { background: var(--info-bg); color: var(--info); }
.stat-icon-green { background: var(--success-bg); color: var(--success); }
.stat-icon-red { background: var(--danger-bg); color: var(--danger); }
.stat-icon-purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-secondary); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ══════════════════════════════════════════════════════════════
   DATA TABLE
   ══════════════════════════════════════════════════════════════ */

.table-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.table-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.btn-ghost {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-ghost:hover {
    color: var(--accent-primary-hover);
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: rgba(30, 41, 59, 0.5);
}

th {
    padding: 14px 20px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    white-space: nowrap;
}

td {
    padding: 14px 20px;
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
    white-space: nowrap;
}

tbody tr {
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

.empty-row td {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-style: italic;
}

/* Action Buttons */
.action-btns {
    display: flex;
    gap: 8px;
}

.btn-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon-edit:hover {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info);
}

.btn-icon-delete:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
}

/* ══════════════════════════════════════════════════════════════
   FORM STYLING
   ══════════════════════════════════════════════════════════════ */

.form-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

input, select {
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    outline: none;
}

input:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--accent-gradient);
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(30, 41, 59, 0.5);
    color: var(--text-primary);
}

.btn-danger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--danger);
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* ══════════════════════════════════════════════════════════════
   SEARCH
   ══════════════════════════════════════════════════════════════ */

.search-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px;
    margin-bottom: 24px;
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    color: var(--text-muted);
}

.search-bar input {
    flex: 1;
    background: transparent;
    border: none;
    font-size: 1rem;
}

.search-bar input:focus {
    box-shadow: none;
}

.search-result {
    animation: fadeInUp 0.3s ease-out;
}

.result-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
}

.result-card h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--success);
}

.result-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.result-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.result-field .field-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
}

.result-field .field-value {
    font-size: 1rem;
    font-weight: 500;
}

.result-not-found {
    background: var(--danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    padding: 28px;
    text-align: center;
    color: var(--danger);
}

/* ── Filter mini-bar ── */
.header-actions {
    display: flex;
    gap: 12px;
}

.search-mini {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
}

.search-mini input {
    background: transparent;
    border: none;
    padding: 4px;
    font-size: 0.85rem;
    width: 180px;
}

.search-mini input:focus {
    box-shadow: none;
}

/* ══════════════════════════════════════════════════════════════
   MODALS
   ══════════════════════════════════════════════════════════════ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 90%;
    max-width: 560px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
}

.modal-sm {
    max-width: 420px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
}

.modal-body-text {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.delete-student-name {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

/* ══════════════════════════════════════════════════════════════
   TOAST NOTIFICATIONS
   ══════════════════════════════════════════════════════════════ */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    min-width: 300px;
    max-width: 420px;
    animation: slideInRight 0.35s ease-out;
    transition: all var(--transition-base);
}

.toast.removing {
    animation: slideOutRight 0.3s ease-in forwards;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-info { border-left: 4px solid var(--info); }
.toast-warning { border-left: 4px solid var(--warning); }

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-info .toast-icon { color: var(--info); }
.toast-warning .toast-icon { color: var(--warning); }

.toast-message {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    flex: 1;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    line-height: 1;
}

/* Blood Group Badge */
.blood-badge {
    display: inline-block;
    padding: 2px 10px;
    background: var(--danger-bg);
    color: var(--danger);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* ══════════════════════════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════════════════════════ */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100px); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.2); }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ══════════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

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

    .result-fields {
        grid-template-columns: 1fr;
    }

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

    .landing-card {
        padding: 30px 20px;
    }

    .title-line {
        font-size: 1.4rem;
    }

    .team-grid {
        flex-direction: column;
        align-items: stretch;
    }

    .table-wrapper {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .landing-card {
        padding: 24px 16px;
    }

    .title-line {
        font-size: 1.2rem;
    }

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

    .form-actions button {
        width: 100%;
        justify-content: center;
    }
}