/* ============================================
   Survei ISP - Premium Design System
   ============================================ */

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

/* --- CSS Custom Properties --- */
:root {
    --primary: #1a5276;
    --primary-light: #2980b9;
    --primary-dark: #0e3a56;
    --primary-glow: rgba(41, 128, 185, 0.25);
    --accent: #00b894;
    --accent-light: #55efc4;
    --accent-dark: #00896e;
    --bg-gradient: linear-gradient(135deg, #0c2340 0%, #1a5276 40%, #2471a3 100%);
    --bg-body: #f0f4f8;
    --surface: #ffffff;
    --surface-hover: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-focus: #2980b9;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* --- Animated Background --- */
.page-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-gradient);
    z-index: -1;
    overflow: hidden;
}

.page-bg::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 184, 148, 0.15) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.page-bg::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(41, 128, 185, 0.1) 0%, transparent 70%);
    bottom: -80px;
    left: -80px;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* --- Layout Containers --- */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 20px;
    animation: fadeInUp 0.6s ease-out;
}

.wide-container {
    max-width: 1500px;
    margin: 0 auto;
    padding: 30px 20px;
    animation: fadeInUp 0.6s ease-out;
}

/* --- Card Component --- */
.card {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

/* --- Glass Card (for completion page) --- */
.card-glass {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 60px 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.3);
    text-align: center;
}

/* --- Header Section --- */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border);
}

.logo {
    max-width: 180px;
    height: auto;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.15));
}

h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.header p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* --- Section Headers --- */
h2 {
    margin-top: 40px;
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 700;
    padding-bottom: 12px;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
    position: relative;
    animation: slideInLeft 0.5s ease-out;
}

h2 .section-icon {
    display: inline-block;
    margin-right: 8px;
    font-size: 1.1rem;
}

/* --- Form Elements --- */
label {
    display: block;
    margin-top: 16px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

input[type="text"],
select {
    width: 100%;
    padding: 12px 16px;
    margin-top: 6px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--surface);
    transition: var(--transition);
    outline: none;
}

input[type="text"]:focus,
select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

input[type="text"]:hover,
select:hover {
    border-color: var(--text-muted);
}

input[type="text"]::placeholder {
    color: var(--text-muted);
}

/* --- Info Note --- */
.note {
    background: linear-gradient(135deg, #eef6ff 0%, #f0f9ff 100%);
    padding: 16px 20px;
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 20px 0;
    line-height: 1.7;
}

.note strong {
    color: var(--primary);
}

/* --- Likert Scale Labels --- */
.scale-labels {
    display: flex;
    justify-content: space-between;
    margin: 12px 0 0;
    padding: 8px 4px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* --- Question Cards --- */
.question {
    padding: 20px 24px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    transition: var(--transition);
    position: relative;
}

.question:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.question strong {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.question p {
    margin: 10px 0 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* --- Likert Radio Buttons --- */
.likert {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.likert label {
    font-weight: 500;
    background: var(--surface);
    border: 2px solid var(--border);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    margin-top: 0;
    user-select: none;
}

.likert label:hover {
    border-color: var(--primary-light);
    background: #f0f7ff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.likert input[type="radio"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.likert input[type="radio"]:checked + span,
.likert label:has(input:checked) {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 12px var(--primary-glow);
}

/* --- Buttons --- */
button,
.btn-export {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: 0.02em;
    box-shadow: 0 4px 15px var(--primary-glow);
}

button:hover,
.btn-export:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

button:active,
.btn-export:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px var(--primary-glow);
}

.btn-submit {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
    border-radius: var(--radius-md);
    margin-top: 40px;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--accent-dark), var(--accent));
    box-shadow: 0 4px 15px rgba(0, 184, 148, 0.25);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #006b54, var(--accent-dark));
    box-shadow: 0 8px 25px rgba(0, 184, 148, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #c0392b, #e74c3c);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.25);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #96281b, #c0392b);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    margin-top: 0;
}

/* --- Center Layout --- */
.center {
    text-align: center;
}

/* --- Success Page --- */
.success-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
    animation: pulse 2s ease-in-out infinite;
}

.success-code {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 12px 30px;
    border-radius: var(--radius-xl);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin: 16px 0;
    box-shadow: 0 4px 15px var(--primary-glow);
}

/* --- Table Styles --- */
.table-wrapper {
    overflow-x: auto;
    margin-top: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

th,
td {
    border: 1px solid var(--border);
    padding: 10px 12px;
    text-align: left;
    white-space: nowrap;
}

th {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: sticky;
    top: 0;
    z-index: 10;
}

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

tbody tr:nth-child(even) {
    background: #f8fafc;
}

tbody tr:hover {
    background: #eef6ff;
    transform: scale(1.001);
}

td:first-child {
    font-weight: 600;
    color: var(--primary);
}

/* --- Admin Toolbar --- */
.admin-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.admin-toolbar h1 {
    font-size: 1.5rem;
}

.admin-toolbar .actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* --- Stats Cards --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-card .stat-icon {
    font-size: 2rem;
    margin-bottom: 8px;
    display: block;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 500;
}

/* --- Login Form --- */
.login-container {
    max-width: 440px;
    margin: 0 auto;
    padding: 80px 20px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 50px 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease-out;
}

.login-card .header {
    border-bottom: none;
    margin-bottom: 30px;
    padding-bottom: 0;
}

.login-card h1 {
    font-size: 1.5rem;
}

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

.login-card button {
    width: 100%;
}

/* --- Alert Messages --- */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    animation: fadeInUp 0.3s ease-out;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* --- Admin Navigation --- */
.admin-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 20px;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-nav .nav-inner {
    max-width: 1500px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.admin-nav .nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    font-size: 1rem;
}

.admin-nav .nav-brand img {
    height: 32px;
    width: auto;
}

.admin-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.admin-nav .nav-links a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.88rem;
    transition: var(--transition);
}

.admin-nav .nav-links a:hover {
    background: #f0f7ff;
    color: var(--primary);
}

.admin-nav .nav-links a.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
}

/* --- Badge --- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.badge-primary {
    background: #eef6ff;
    color: var(--primary);
}

.badge-success {
    background: #f0fdf4;
    color: #166534;
}

/* --- Progress Indicator --- */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    margin: 24px 0;
    overflow: hidden;
}

.progress-bar .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* --- Footer --- */
.footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.footer a {
    color: var(--primary-light);
    text-decoration: none;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .container {
        padding: 16px 12px;
    }

    .card {
        padding: 24px 18px;
        border-radius: var(--radius-lg);
    }

    h1 {
        font-size: 1.4rem;
    }

    h2 {
        font-size: 1.1rem;
    }

    .likert {
        gap: 8px;
    }

    .likert label {
        padding: 8px 14px;
        font-size: 0.85rem;
    }

    .question {
        padding: 16px;
    }

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

    .admin-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .admin-nav .nav-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 0;
        gap: 8px;
    }

    .login-card {
        padding: 30px 24px;
    }
}

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

    .likert {
        flex-direction: column;
    }

    .likert label {
        width: 100%;
        justify-content: center;
    }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* --- Print Styles --- */
@media print {
    .admin-nav,
    .btn-export,
    .admin-toolbar .actions {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .card::before {
        display: none;
    }
}