/* AI Mentor Hub - Modern Professional Design */

:root {
    --primary: #6366F1;
    --primary-dark: #4F46E5;
    --primary-light: #818CF8;
    --success: #10B981;
    --error: #EF4444;
    --bg: #F9FAFB;
    --surface: #FFFFFF;
    --border: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
    --primary: #818CF8;
    --primary-dark: #6366F1;
    --primary-light: #A5B4FC;
    --success: #34D399;
    --error: #F87171;
    --bg: #111827;
    --surface: #1F2937;
    --border: #374151;
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem 1rem;
    transition: background 0.3s, color 0.3s;
    position: relative;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.6s ease;
}

.logo {
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.75rem;
    overflow: visible;
    line-height: 1.3;
}

.logo-text {
    display: inline-block;
}

.logo-ai {
    display: inline-block;
    font-weight: 900;
    font-size: 1.35em;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: 0 0.25rem;
    margin: 0 0.2rem;
    position: relative;
    letter-spacing: 0.08em;
    transform: scale(1.05);
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5))
            drop-shadow(0 0 20px rgba(99, 102, 241, 0.3));
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

.ai-badge {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 2rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* AI Welcome Message */
.ai-welcome-message {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border: 2px solid var(--primary);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    animation: fadeInDown 0.8s ease 0.2s both;
}

.ai-welcome-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-welcome-icon svg {
    color: white;
    width: 24px;
    height: 24px;
}

.ai-welcome-text {
    flex: 1;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.6;
}

.ai-welcome-text strong {
    color: var(--primary);
    font-weight: 700;
}

.ai-welcome-note {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* View Booking Button */
.view-booking-btn {
    position: fixed;
    bottom: 2rem;
    right: 9rem;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: white;
    border: none;
    border-radius: 50%;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow:
        0 8px 20px rgba(99, 102, 241, 0.5),
        0 0 0 0 rgba(99, 102, 241, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.view-booking-btn::before {
    content: 'View Previous Booking';
    position: absolute;
    right: 75px;
    background: var(--surface);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transform: translateX(10px);
    transition: all 0.3s;
    pointer-events: none;
    box-shadow: var(--shadow);
    border: 2px solid var(--border);
}

.view-booking-btn:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.view-booking-btn:hover {
    transform: scale(1.15) rotate(5deg);
    box-shadow:
        0 15px 35px rgba(99, 102, 241, 0.6),
        0 0 0 8px rgba(99, 102, 241, 0.2);
}

.view-booking-btn:active {
    transform: scale(1.05) rotate(-3deg);
}

.view-booking-btn svg {
    width: 28px;
    height: 28px;
    stroke-width: 2.5;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* Email Contact Button */
.email-contact-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: white;
    text-decoration: none;
    border-radius: 50%;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow:
        0 8px 20px rgba(99, 102, 241, 0.5),
        0 0 0 0 rgba(99, 102, 241, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.email-contact-btn::before {
    content: 'Email Me';
    position: absolute;
    right: 75px;
    background: var(--surface);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transform: translateX(10px);
    transition: all 0.3s;
    pointer-events: none;
    box-shadow: var(--shadow);
    border: 2px solid var(--border);
}

.email-contact-btn:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.email-contact-btn:hover {
    transform: scale(1.15) rotate(5deg);
    box-shadow:
        0 15px 35px rgba(99, 102, 241, 0.6),
        0 0 0 8px rgba(99, 102, 241, 0.2);
}

.email-contact-btn:active {
    transform: scale(1.05) rotate(3deg);
}

.email-contact-btn svg {
    width: 28px;
    height: 28px;
    stroke-width: 2.5;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--primary);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    stroke-width: 2;
    color: var(--text-primary);
}

/* Progress Bar */
.progress-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3rem;
    padding: 0 1rem;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.step-circle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--surface);
    border: 3px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--text-tertiary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 0.5rem;
}

.progress-step.active .step-circle {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.15);
    box-shadow: 0 0 0 8px rgba(99, 102, 241, 0.2);
}

.progress-step.completed .step-circle {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.step-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    transition: color 0.3s;
}

.progress-step.active .step-label {
    color: var(--primary);
}

.progress-line {
    flex: 1;
    height: 3px;
    background: var(--border);
    margin: 0 0.5rem 24px;
    position: relative;
    overflow: hidden;
}

.progress-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background: var(--success);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-step.completed + .progress-line::after {
    width: 100%;
}

/* Form Card */
.form-card {
    background: var(--surface);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    padding: 3rem;
    border: 1px solid var(--border);
    animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.step {
    display: none;
}

.step.active {
    display: block;
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    animation: fadeInDown 0.5s ease 0.1s backwards;
}

.step-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
    animation: fadeInDown 0.5s ease 0.2s backwards;
}

/* Form Elements */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.5s ease backwards;
}

.form-group:nth-child(1) { animation-delay: 0.3s; }
.form-group:nth-child(2) { animation-delay: 0.4s; }
.form-group:nth-child(3) { animation-delay: 0.5s; }
.form-group:nth-child(4) { animation-delay: 0.6s; }

label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

input,
select,
textarea {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    background: var(--bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
    font-family: inherit;
}

textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

input:hover,
select:hover,
textarea:hover {
    border-color: var(--text-tertiary);
}

.form-hint {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.button-group .btn-primary {
    flex: 2;
}

.button-group .btn-secondary {
    flex: 1;
}

/* Loading States */
.loading-container {
    text-align: center;
    padding: 4rem 2rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1.5rem;
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Time Slots Grid */
.slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
    max-height: 500px;
    overflow-y: auto;
    padding: 0.5rem;
}

.time-slot {
    padding: 1.25rem;
    border: 2px solid var(--border);
    border-radius: 1rem;
    background: var(--bg);
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.time-slot:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 12px -4px rgba(99, 102, 241, 0.2);
}

.time-slot.selected {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 8px 16px -4px rgba(99, 102, 241, 0.4);
}

.time-slot.selected * {
    color: white !important;
}

.time-day {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.time-date {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.time-time {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Success State */
.success-container {
    text-align: center;
}

.success-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
}

.success-circle {
    stroke: var(--success);
    stroke-width: 2;
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.success-check {
    stroke: var(--success);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.5s forwards;
}

@keyframes stroke {
    to { stroke-dashoffset: 0; }
}

.success-message {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.booking-details {
    background: var(--bg);
    border-radius: 1rem;
    padding: 2rem;
    margin: 2.5rem 0;
    border: 2px solid var(--border);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

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

.detail-icon {
    width: 40px;
    height: 40px;
    border-radius: 0.5rem;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.detail-content {
    text-align: left;
}

.detail-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.detail-value {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Calendar Section */
.calendar-section {
    margin: 2.5rem 0;
    padding: 2rem;
    background: var(--bg);
    border-radius: 1rem;
    border: 2px solid var(--border);
}

.calendar-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.btn-calendar {
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-family: inherit;
    font-size: 0.95rem;
}

.btn-calendar svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.btn-calendar.google:hover {
    border-color: #4285F4;
    color: #4285F4;
    transform: translateY(-2px);
}

.btn-calendar.apple:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Contact Section */
.contact-section {
    margin: 2.5rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: 1rem;
    border: 2px solid var(--primary);
    text-align: center;
}

.contact-section h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.contact-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.btn-contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

.btn-contact:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-contact svg {
    flex-shrink: 0;
}

/* Scrollbar */
.slots-grid::-webkit-scrollbar {
    width: 8px;
}

.slots-grid::-webkit-scrollbar-track {
    background: var(--bg);
    border-radius: 4px;
}

.slots-grid::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.slots-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

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

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

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

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Responsive */
@media (max-width: 768px) {
    .form-card {
        padding: 2rem 1.5rem;
    }

    .logo {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .progress-bar {
        padding: 0;
    }

    .step-label {
        display: none;
    }

    .progress-line {
        margin-bottom: 0;
    }

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

    .button-group {
        flex-direction: column-reverse;
    }

    .button-group .btn-primary,
    .button-group .btn-secondary {
        flex: 1;
        width: 100%;
    }

    .slots-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .calendar-buttons {
        grid-template-columns: 1fr;
    }

    /* Welcome Modal Mobile */
    .welcome-modal {
        padding: 1rem;
    }

    .welcome-modal-content {
        max-height: 95vh;
    }

    .welcome-modal-header {
        padding: 2rem 1.5rem;
    }

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

    .welcome-subtitle {
        font-size: 1rem;
    }

    .welcome-modal-body {
        padding: 2rem 1.5rem;
    }

    .welcome-content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .welcome-left-column,
    .welcome-right-column {
        animation: fadeIn 0.8s ease 0.4s backwards;
    }

    .welcome-message-large h2 {
        font-size: 1.25rem;
    }

    .welcome-message-large p {
        font-size: 0.95rem;
    }

    .mentor-card {
        padding: 1.5rem;
    }

    .mentor-info h3 {
        font-size: 1.4rem;
    }

    .mentor-info p {
        font-size: 0.95rem;
    }

    .cta-text {
        font-size: 1.05rem;
    }

    .btn-welcome-start {
        padding: 1rem 2rem;
        font-size: 1rem;
        width: 100%;
    }

    .view-booking-btn {
        width: 56px;
        height: 56px;
        bottom: 1.5rem;
        right: 7rem;
    }

    .view-booking-btn svg {
        width: 24px;
        height: 24px;
    }

    .view-booking-btn::before {
        display: none;
    }

    .email-contact-btn {
        width: 56px;
        height: 56px;
        bottom: 1.5rem;
        right: 1.5rem;
    }

    .email-contact-btn svg {
        width: 24px;
        height: 24px;
    }

    .email-contact-btn::before {
        display: none;
    }
}

/* Welcome Modal */
.welcome-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1.5rem;
    animation: modalFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.welcome-modal.hidden {
    display: none;
}

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

.welcome-modal-content {
    background: var(--surface);
    border-radius: 1.5rem;
    max-width: 1100px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto; /* make the whole content scrollable so header scrolls away */
    box-shadow: var(--shadow-lg);
    animation: contentSlideUp 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border);
    position: relative;
    display: flex;
    flex-direction: column;
}

@keyframes contentSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.welcome-modal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 3rem 3rem 2.5rem;
    border-radius: 1.5rem 1.5rem 0 0;
    position: relative; /* keep it in document flow so it scrolls with the content */
    overflow: hidden;
    flex-shrink: 0;
    animation: headerFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

/* ensure body doesn't independently scroll (the parent `.welcome-modal-content` will scroll) */
.welcome-modal-body {
    overflow-y: visible;
}

/* Smooth hide/translate behavior when modal body is scrolled */
.welcome-modal-header {
    transition: transform 220ms cubic-bezier(0.2, 0, 0, 1),
                opacity 180ms cubic-bezier(0.2, 0, 0, 1);
    will-change: transform, opacity;
}

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

.welcome-modal-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.welcome-modal-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.75rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    letter-spacing: -0.01em;
}

.welcome-subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    margin: 0;
    position: relative;
    z-index: 1;
}

.welcome-modal-body {
    padding: 3rem;
    flex: 1;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    animation: bodyFadeIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.4s backwards;
}

.welcome-modal-body::-webkit-scrollbar {
    display: none;
}

@keyframes bodyFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Two column layout for better use of space */
.welcome-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.welcome-left-column {
    animation: slideInLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.6s backwards;
}

.welcome-right-column {
    animation: slideInRight 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.6s backwards;
}

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

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

.welcome-message-large {
    margin-bottom: 2rem;
}

.welcome-message-large h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.welcome-message-large p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.welcome-message-large strong {
    color: var(--primary);
    font-weight: 700;
}

.mentor-intro {
    margin-bottom: 0;
}

.mentor-card {
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    transition: all 0.3s ease;
}

.mentor-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.15);
    transform: translateY(-2px);
}

.mentor-info h2 {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.mentor-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.mentor-info p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.welcome-cta {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.8s backwards;
}

.cta-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.btn-welcome-start {
    padding: 1.1rem 2.5rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn-welcome-start::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-welcome-start:hover::before {
    width: 300px;
    height: 300px;
}

.btn-welcome-start:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

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

.welcome-note {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-style: italic;
}

@keyframes slideUpFade {
    0% {
        opacity: 0;
        transform: translateY(40px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Questionnaire Styles */
.question-progress {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.questionnaire {
    max-height: 500px;
    overflow-y: auto;
    padding-right: 1rem;
}

.question-group {
    margin-bottom: 1.5rem;
}

.question-label {
    display: block;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg);
    animation: slideInRight 0.4s ease backwards;
}

.radio-option:nth-child(1),
.checkbox-option:nth-child(1) { animation-delay: 0.3s; }
.radio-option:nth-child(2),
.checkbox-option:nth-child(2) { animation-delay: 0.35s; }
.radio-option:nth-child(3),
.checkbox-option:nth-child(3) { animation-delay: 0.4s; }
.radio-option:nth-child(4),
.checkbox-option:nth-child(4) { animation-delay: 0.45s; }
.radio-option:nth-child(5),
.checkbox-option:nth-child(5) { animation-delay: 0.5s; }
.radio-option:nth-child(6),
.checkbox-option:nth-child(6) { animation-delay: 0.55s; }
.radio-option:nth-child(7),
.checkbox-option:nth-child(7) { animation-delay: 0.6s; }

.radio-option:hover,
.checkbox-option:hover {
    border-color: var(--primary);
    background: var(--surface);
    transform: translateX(5px);
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 1rem;
    cursor: pointer;
    accent-color: var(--primary);
}

.radio-option input[type="radio"]:checked ~ span,
.checkbox-option input[type="checkbox"]:checked ~ span {
    font-weight: 600;
    color: var(--primary);
}

.radio-option:has(input:checked),
.checkbox-option:has(input:checked) {
    border-color: var(--primary);
    background: var(--accent-light);
}

.radio-option span,
.checkbox-option span {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.option-hint {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 400;
    line-height: 1.4;
    margin-top: 0.25rem;
}

/* Focus Styles */
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Utility classes */
.hidden {
    display: none !important;
}

/* Slot placeholder / messages styled via classes instead of inline styles */
.slots-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.slots-empty p {
    margin: 0;
}

.error-text {
    color: var(--error);
    font-weight: 700;
}

/* AI Built Popup - Compact & Tasteful */
.ai-popup {
    position: fixed;
    left: 1.5rem;
    top: 1.5rem;
    z-index: 9999;
    max-width: clamp(280px, 25vw, 380px);
    animation: slideInLeft 0.5s ease-out;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.ai-popup.hidden {
    opacity: 0;
    transform: translateX(-400px);
    pointer-events: none;
}

.ai-popup-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}

.ai-popup-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.35rem;
    line-height: 1;
    transition: all 0.2s;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    width: 28px;
    height: 28px;
}

.ai-popup-close:hover {
    background: rgba(0, 0, 0, 0.2);
    transform: scale(1.1);
}

.ai-popup-close svg {
    stroke-width: 2.5;
}

.ai-popup-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 1.25rem 1rem;
    text-align: center;
    color: white;
}

.ai-popup-icon {
    width: 32px;
    height: 32px;
    margin: 0 auto 0.5rem;
    display: block;
    stroke: white;
    fill: none;
    stroke-width: 2;
}

.ai-popup-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    line-height: 1.3;
}

.ai-popup-body {
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.ai-popup-feature {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
}

.feature-icon {
    width: 18px;
    height: 18px;
    stroke: var(--primary);
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.ai-popup-feature span {
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.ai-popup-footer {
    background: var(--bg);
    padding: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.ai-popup-footer p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.ai-popup-footer p:first-child {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 0.15rem;
}

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

/* Responsive - hide on smaller screens */
@media (max-width: 768px) {
    .ai-popup {
        display: none;
    }
}

/* Admin Access - Simple Text Below Content */
.admin-access-footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem 0;
}

.admin-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
}

.admin-link:hover {
    color: var(--primary);
    text-decoration: underline;
}