/* ============================================
   AI INTERVIEW - GLASSMORPHISM DESIGN SYSTEM
   ============================================ */

:root {
    /* Colors */
    --primary-color: #5B4FDB;
    --primary-hover: #4A3EC9;
    --primary-light: #7D73E8;
    --secondary-color: #FF6B9D;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-bg-strong: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --glass-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-purple: linear-gradient(135deg, #a8c0ff 0%, #3f2b96 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   GRADIENT BACKGROUND
   ============================================ */

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-purple);
    z-index: -1;
}

.gradient-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.gradient-bg::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,107,157,0.2) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite reverse;
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.robot-container {
    margin-bottom: var(--spacing-xl);
}

.robot-avatar {
    width: 200px;
    height: 220px;
    margin: 0 auto;
    position: relative;
    animation: hover 3s ease-in-out infinite;
}

.robot-head {
    width: 120px;
    height: 120px;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 2px solid var(--glass-border);
    position: relative;
    margin: 0 auto;
    box-shadow: var(--glass-shadow);
}

.robot-antenna {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 20px;
    background: linear-gradient(to bottom, var(--primary-color), transparent);
}

.antenna-ball {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--secondary-color);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 107, 157, 0.8);
    animation: pulse 2s ease-in-out infinite;
}

.robot-face {
    padding: var(--spacing-lg);
}

.robot-eye {
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    border-radius: 50%;
    display: inline-block;
    margin: var(--spacing-md) var(--spacing-sm);
    box-shadow: 0 0 15px rgba(91, 79, 219, 0.7);
    animation: blink 4s ease-in-out infinite;
}

.robot-eye.left {
    animation-delay: 0.1s;
}

.robot-mouth {
    width: 40px;
    height: 20px;
    border: 3px solid var(--primary-color);
    border-top: none;
    border-radius: 0 0 20px 20px;
    margin: var(--spacing-md) auto 0;
}

.robot-body {
    width: 100px;
    height: 80px;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 2px solid var(--glass-border);
    margin: -10px auto 0;
    box-shadow: var(--glass-shadow);
    position: relative;
}

.robot-chest {
    padding: var(--spacing-md);
}

.chest-icon {
    font-size: var(--font-size-2xl);
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    max-width: 700px;
    margin: 0 auto;
}

.info-card {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.info-card:hover {
    transform: translateY(-4px);
}

.card-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.card-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: left;
}

.card-text strong {
    font-size: var(--font-size-lg);
    color: white;
    font-weight: 600;
}

.card-text span {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   GLASS CARD
   ============================================ */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    box-shadow: var(--glass-shadow-hover);
}

/* ============================================
   FORM SECTION
   ============================================ */

.form-section {
    max-width: 600px;
    margin: var(--spacing-2xl) auto;
}

.form-card {
    padding: var(--spacing-xl);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.form-header h2 {
    font-size: var(--font-size-2xl);
    color: white;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.form-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
}

/* Form Groups */
.candidate-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    color: white;
    font-weight: 500;
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.label-icon {
    font-size: var(--font-size-lg);
}

.required {
    color: var(--secondary-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    color: #333;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 4px rgba(91, 79, 219, 0.1);
}

.form-group input::placeholder {
    color: rgba(0, 0, 0, 0.4);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

/* Checkbox */
.checkbox-group {
    margin-top: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    cursor: pointer;
    position: relative;
    padding-left: 32px;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    position: absolute;
    left: 0;
    top: 2px;
    height: 20px;
    width: 20px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    border: 2px solid rgba(255, 255, 255, 0.4);
    transition: all var(--transition-fast);
}

.checkbox-label:hover .checkmark {
    background-color: rgba(255, 255, 255, 0.3);
}

.checkbox-label input:checked ~ .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkmark::after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label input:checked ~ .checkmark::after {
    display: block;
}

.checkbox-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* Error Messages */
.error-message {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    display: none;
    background: rgba(244, 67, 54, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.error-message.show {
    display: block;
}

.form-group.error input,
.form-group.error select {
    border-color: var(--error-color);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn-primary {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    box-shadow: 0 8px 24px rgba(91, 79, 219, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(91, 79, 219, 0.5);
}

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

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

.btn-icon {
    font-size: var(--font-size-xl);
}

.btn-loader {
    display: inline-flex;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ============================================
   TIPS SECTION
   ============================================ */

.tips-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.tips-section h3 {
    color: white;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.tips-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tips-list li {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.tips-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transform: translateX(400px);
    transition: transform var(--transition-normal);
    z-index: 1000;
    max-width: 350px;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 36px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
    }
    
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .hero-section {
        padding: var(--spacing-lg) 0;
    }
    
    .robot-avatar {
        width: 160px;
        height: 180px;
    }
    
    .robot-head {
        width: 100px;
        height: 100px;
    }
    
    .robot-body {
        width: 80px;
        height: 60px;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
    
    .form-card {
        padding: var(--spacing-lg);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .toast {
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes hover {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translateX(-50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) scale(1.2);
        opacity: 0.8;
    }
}

@keyframes blink {
    0%, 90%, 100% {
        opacity: 1;
    }
    95% {
        opacity: 0;
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(5deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(-5deg);
    }
}

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