/* Modern Apple-inspired CSS for OSIS Announcement System */

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

:root {
    /* Colors */
    --primary: #007AFF;
    --primary-dark: #0056CC;
    --success: #34C759;
    --success-dark: #28A745;
    --danger: #FF3B30;
    --danger-dark: #DC3545;
    --warning: #FF9500;
    --warning-dark: #FD7E14;
    --info: #5AC8FA;
    --info-dark: #17A2B8;
    
    /* Neutral Colors */
    --background: #F2F2F7;
    --surface: #FFFFFF;
    --surface-secondary: #F8F9FA;
    --text-primary: #1D1D1F;
    --text-secondary: #6E6E73;
    --text-tertiary: #8E8E93;
    --border: #D1D1D6;
    --border-light: #E5E5EA;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.2);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), #5856D6);
    --gradient-success: linear-gradient(135deg, var(--success), #30D158);
    --gradient-danger: linear-gradient(135deg, var(--danger), #FF453A);
    --gradient-surface: linear-gradient(145deg, #FFFFFF, #F8F9FA);
    
    /* Animations */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #F2F2F7 0%, #E5E5EA 100%);
}

/* Page Management */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Cards */
.announcement-card,
.validation-card,
.result-card {
    background: var(--gradient-surface);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    max-width: 600px;
    width: 100%;
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Headers */
.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
    border: 1px solid var(--border-light);
}

/* Countdown Timer */
.countdown-timer {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin: 40px 0;
}

.time-unit {
    background: var(--gradient-surface);
    padding: 24px 16px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.time-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    animation: pulse 2s infinite;
}

.time-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.info-card {
    background: var(--gradient-surface);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.info-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* Forms */
.validation-form {
    text-align: left;
    margin-top: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--border-light);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--surface);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.input-help {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* Buttons */
.submit-btn, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    outline: none;
    min-width: 140px;
}

.submit-btn, .btn.primary {
    background: var(--gradient-primary);
    color: white;
}

.submit-btn:hover, .btn.primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn.secondary:hover {
    background: var(--border-light);
    transform: translateY(-1px);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.loading-spinner {
    display: none;
}

.loading-spinner i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Result Cards */
.result-card.success {
    border-left: 4px solid var(--success);
}

.result-card.failed {
    border-left: 4px solid var(--danger);
}

.result-card.not-found {
    border-left: 4px solid var(--warning);
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 24px;
    animation: fadeInScale 0.6s ease-out;
}

.result-icon.success { color: var(--success); }
.result-icon.failed { color: var(--danger); }
.result-icon.not-found { color: var(--warning); }

.result-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.result-title.success { color: var(--success-dark); }
.result-title.failed { color: var(--danger-dark); }
.result-title.not-found { color: var(--warning-dark); }

.result-message {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

.result-badge {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
}

.result-badge.success {
    background: var(--gradient-success);
    color: white;
}

.result-badge.failed {
    background: var(--gradient-danger);
    color: white;
}

/* Student Info */
.student-info {
    background: var(--surface-secondary);
    padding: 24px;
    border-radius: 16px;
    margin: 24px 0;
    border: 1px solid var(--border-light);
}

.student-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item label {
    font-weight: 600;
    color: var(--text-secondary);
}

.info-item span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Position Info */
.position-info {
    background: linear-gradient(135deg, var(--success), #30D158);
    color: white;
    padding: 24px;
    border-radius: 16px;
    margin: 24px 0;
}

.position-info h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.position-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 12px 20px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Encouragement Info */
.encouragement-info {
    text-align: left;
    margin: 24px 0;
}

.encouragement-card {
    background: var(--surface-secondary);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    margin-bottom: 20px;
    text-align: center;
}

.encouragement-card i {
    font-size: 2rem;
    color: var(--danger);
    margin-bottom: 16px;
}

.encouragement-card h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

.opportunities {
    background: var(--surface);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-light);
}

.opportunities h4 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.opportunities ul {
    list-style: none;
}

.opportunities li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.opportunities li i {
    color: var(--primary);
    width: 16px;
}

/* Error Details */
.error-details {
    text-align: left;
    margin: 24px 0;
}

.error-info, .help-info {
    background: var(--surface-secondary);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    margin-bottom: 20px;
}

.error-info h3, .help-info h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.error-info ul {
    list-style: none;
}

.error-info li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.error-info li i {
    color: var(--warning);
}

.help-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.help-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.step-number {
    background: var(--primary);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.step-content strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
}

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

/* Contact Info */
.contact-info {
    background: var(--surface-secondary);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    margin: 24px 0;
    text-align: left;
}

.contact-info h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border-light);
}

.contact-item i {
    color: var(--primary);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .announcement-card,
    .validation-card,
    .result-card {
        padding: 24px;
    }
    
    .countdown-timer {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .time-value {
        font-size: 2rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .result-title {
        font-size: 1.8rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .countdown-timer {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .time-unit {
        padding: 16px 12px;
    }
    
    .time-value {
        font-size: 1.8rem;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .result-icon {
        font-size: 3rem;
    }
}
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 24rem;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-elegant);
}

.error-icon {
    font-size: 4rem;
    color: var(--destructive);
    margin-bottom: 1rem;
}

.error-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--foreground);
    margin-bottom: 0.5rem;
}

.error-message {
    color: var(--muted-foreground);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.error-btn {
    background: var(--primary);
    color: var(--primary-foreground);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.error-btn:hover {
    background: #2563eb;
}

/* Responsive Design */
@media (max-width: 768px) {
    .validation-card {
        margin: 1rem;
    }
    
    .header-content {
        padding: 1rem;
    }
    
    .results-main {
        padding: 2rem 1rem;
    }
    
    .student-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .student-name {
        font-size: 1.5rem;
    }
    
    .result-icon {
        font-size: 3rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.fade-out {
    animation: fadeOut 0.3s ease-out;
}

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

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