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

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-color: #10b981;
    --error-color: #ef4444;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: var(--primary-gradient);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    font-weight: 300;
}

/* Search Section */
.search-section {
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    gap: 15px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

#studentIdInput {
    flex: 1;
    padding: 15px 20px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--dark-bg);
    color: var(--text-primary);
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

#studentIdInput:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-primary {
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.btn-secondary {
    padding: 12px 25px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

/* Messages */
.message {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
}

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

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

.error-message {
    background: rgba(239, 68, 68, 0.15);
    border-left: 4px solid var(--error-color);
    color: #fca5a5;
}

.success-message {
    background: rgba(16, 185, 129, 0.15);
    border-left: 4px solid var(--success-color);
    color: #6ee7b7;
}

.hidden {
    display: none !important;
}

/* ID Card Container */
.card-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ID Card */
.id-card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.id-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.6);
}

.card-header {
    background: var(--primary-gradient);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.3));
}

.institution-name h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.card-body {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    padding: 30px;
}

.photo-section {
    display: flex;
    justify-content: center;
}

.photo-frame {
    width: 180px;
    height: 220px;
    border-radius: 15px;
    overflow: hidden;
    border: 3px solid var(--border-color);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.student-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.info-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-content: center;
}

.info-row {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.card-footer {
    background: var(--dark-bg);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
}

.photo-actions {
    display: flex;
    gap: 12px;
    flex: 1;
    justify-content: flex-end;
}

.photo-actions .btn-secondary,
.photo-actions .btn-primary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9rem;
}

.qr-placeholder {
    color: var(--text-secondary);
}

/* Upload Section */
.upload-section {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    border: 2px dashed var(--border-color);
    transition: all 0.3s ease;
}

.upload-section:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.upload-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.upload-icon {
    color: #667eea;
    margin-bottom: 10px;
}

.upload-box h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.upload-description {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.file-name {
    padding: 10px 20px;
    background: var(--dark-bg);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header {
        padding: 30px 15px;
        margin-bottom: 25px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .search-box {
        flex-direction: column;
        gap: 10px;
    }

    #studentIdInput {
        padding: 12px 15px;
        font-size: 0.95rem;
    }

    .btn-primary {
        width: 100%;
        justify-content: center;
        padding: 14px 20px;
    }

    .card-body {
        grid-template-columns: 160px 1fr;
        gap: 15px;
        padding: 20px 15px;
    }

    .photo-section {
        justify-content: flex-start;
    }

    .photo-frame {
        width: 150px;
        height: 180px;
    }

    .info-section {
        text-align: left;
    }

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

    .card-header {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .logo {
        width: 50px;
        height: 50px;
    }

    .institution-name h2 {
        font-size: 1.25rem;
    }

    .upload-section {
        padding: 25px 15px;
    }

    .upload-box h3 {
        font-size: 1.25rem;
    }

    .upload-description {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .search-box {
        padding: 10px;
    }

    #studentIdInput {
        padding: 10px 12px;
    }

    .btn-primary {
        padding: 12px 15px;
        font-size: 0.9rem;
    }

    .btn-secondary {
        padding: 10px 20px;
        font-size: 0.85rem;
    }

    .card-body {
        grid-template-columns: 130px 1fr;
        gap: 12px;
        padding: 15px 10px;
    }

    .photo-frame {
        width: 120px;
        height: 150px;
    }

    .value {
        font-size: 0.95rem;
    }

    .label {
        font-size: 0.7rem;
    }

    .card-header {
        padding: 15px;
    }

    .institution-name h2 {
        font-size: 1.1rem;
    }

    .message {
        padding: 12px 15px;
        font-size: 0.9rem;
    }

    .upload-box h3 {
        font-size: 1.1rem;
    }

    .photo-actions {
        flex-direction: column;
        width: 100%;
    }

    .photo-actions .btn-secondary,
    .photo-actions .btn-primary {
        width: 100%;
        justify-content: center;
    }
}