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

:root {
    /* Light mode colors - Modern Peruna branding */
    --primary-blue: #1e40af;
    --primary-red: #dc2626;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #e1e4e8;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --overlay: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    /* Dark mode colors - Modern red primary for dark mode */
    --primary-blue: #ef4444;
    --primary-red: #ef4444;
    --bg-primary: #1a1a1a;
    --bg-secondary: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: #333333;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
    --overlay: rgba(255, 255, 255, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Page Management */
.page {
    display: none;
    min-height: 100vh;
}

.page.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ========== LOGIN PAGE ========== */
.login-container {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 90%;
    border: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: 1rem;
}

.login-header .logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 0.5rem;
}

.login-header h1 {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--primary-blue);
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    font-weight: 500;
    letter-spacing: -0.03em;
}

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

.login-form {
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 0.85rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.65rem 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

[data-theme="dark"] .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ccc' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Remove spinner from number inputs */
.form-group input[type="number"] {
    -moz-appearance: textfield;
}

.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.btn {
    padding: 0.65rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #1e3a8a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

[data-theme="dark"] .btn-primary:hover {
    background: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary:hover {
    background: #555555;
    transform: translateY(-1px);
}

.btn-microsoft {
    background: white;
    color: #5e5e5e;
    border: 1px solid #8c8c8c;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
}

[data-theme="dark"] .btn-microsoft {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-microsoft:hover {
    background: #f3f3f3;
    border-color: #5e5e5e;
    transform: translateY(-1px);
}

[data-theme="dark"] .btn-microsoft:hover {
    background: var(--bg-primary);
}

.microsoft-login {
    margin-bottom: 1.5rem;
}

.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
}

.error-message {
    color: var(--primary-red);
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
    font-weight: 500;
}

.demo-info {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-blue);
}

.demo-info h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.demo-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.demo-info ul {
    list-style: none;
    font-size: 0.9rem;
}

.demo-info ul li {
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

/* ========== CHAT PAGE - HEUREKA STYLE ========== */
#chatPage.active {
    display: block;
    padding: 0;
}

.chat-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Minimal Header */
.chat-header-minimal {
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.chat-header-minimal.scrolled {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(225, 228, 232, 0.3);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .chat-header-minimal.scrolled {
    background: rgba(26, 26, 26, 0.7);
    border-bottom: 1px solid rgba(51, 51, 51, 0.3);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-minimal {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.logo-text {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-icon-minimal {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon-minimal:hover {
    background: var(--bg-secondary);
}

.user-avatar {
    width: 26px;
    height: 26px;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    padding: 0;
}

.user-avatar:hover {
    opacity: 0.8;
}

/* Profile icon */
.profile-icon-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Make profile icon white in dark mode */
[data-theme="dark"] .profile-icon-img {
    filter: brightness(0) invert(1);
}

/* Welcome Screen - Centered Layout */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 2rem;
    padding-top: 8rem;
    max-width: 900px;
    margin: 0 auto;
}

.welcome-message {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 6rem;
    line-height: 1.3;
    letter-spacing: -0.03em;
}

.search-container-main {
    width: 100%;
    max-width: 700px;
}

.search-container-main form {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-main {
    width: 100%;
    padding: 1.25rem 5rem 1.25rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.search-input-main:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.08);
}

[data-theme="dark"] .search-input-main:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.search-input-main::placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

.search-btn-main {
    position: absolute;
    right: 0.5rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-btn-main:hover {
    background: #1e3a8a;
    transform: scale(1.05);
}

[data-theme="dark"] .search-btn-main:hover {
    background: #dc2626;
}

.search-btn-main:active {
    transform: scale(0.95);
}

/* Chat Area - Shown after first message */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 2rem 3rem;
    overflow-y: auto;
}

.chat-messages-centered {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    padding: 2rem 0;
}

.message {
    margin-bottom: 2rem;
    animation: fadeIn 0.4s ease;
}

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

.message-content {
    padding: 1.25rem 1.5rem;
    border-radius: 16px;
    max-width: 85%;
}

.message.user .message-content {
    background: var(--primary-blue);
    color: white;
    margin-left: auto;
    box-shadow: 0 2px 12px rgba(30, 64, 175, 0.2);
}

[data-theme="dark"] .message.user .message-content {
    box-shadow: 0 2px 12px rgba(239, 68, 68, 0.3);
}

.message.assistant .message-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.message-content strong {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
}

.message.assistant .message-content strong {
    color: var(--primary-red);
}

.message.user .message-content strong {
    color: white;
}

.message-content p {
    margin: 0.5rem 0;
    line-height: 1.7;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
}

.message-content ul li {
    margin: 0.5rem 0;
}

/* Table styling for alumni results */
.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
    background: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.message-content table thead {
    background: var(--primary-blue);
    color: white;
}

[data-theme="dark"] .message-content table thead {
    background: var(--primary-red);
}

.message-content table th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.message-content table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.message-content table tbody tr:last-child td {
    border-bottom: none;
}

.message-content table tbody tr {
    transition: background-color 0.2s ease;
}

.message-content table tbody tr:hover {
    background-color: var(--overlay);
}

.message-content table a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

[data-theme="dark"] .message-content table a {
    color: var(--primary-red);
}

.message-content table a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.message-content table td strong {
    display: inline;
    margin: 0;
    font-weight: 600;
}

.message.loading .message-content {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-style: italic;
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* LCD Pixel Art Horse Animation */
.lcd-horse-container {
    display: inline-block;
    width: 80px;
    height: 32px;
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.lcd-horse-canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: loadingDot 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes loadingDot {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Bottom Input */
.chat-input-container-bottom {
    padding: 1.5rem 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.chat-input-container-bottom form {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-bottom {
    width: 100%;
    padding: 1rem 4.5rem 1rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.search-input-bottom:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.08);
}

[data-theme="dark"] .search-input-bottom:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.search-btn-bottom {
    position: absolute;
    right: 0.5rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-btn-bottom:hover {
    background: #1e3a8a;
    transform: scale(1.05);
}

[data-theme="dark"] .search-btn-bottom:hover {
    background: #dc2626;
}

.search-btn-bottom:active {
    transform: scale(0.95);
}

/* User Menu Dropdown */
.user-menu {
    position: absolute;
    top: 5rem;
    right: 3rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    min-width: 160px;
    z-index: 1000;
}

.menu-item {
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    text-align: left;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.menu-item:hover {
    background: var(--bg-secondary);
}

.menu-icon {
    width: 18px;
    height: 18px;
}

/* Make menu icon white in dark mode */
[data-theme="dark"] .menu-icon {
    filter: brightness(0) invert(1);
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .chat-header-minimal {
        padding: 1rem 1.5rem;
    }

    .welcome-message {
        font-size: 2rem;
        margin-bottom: 3rem;
    }

    .chat-area {
        padding: 1rem 1.5rem;
    }

    .message-content {
        max-width: 95%;
    }

    .login-container {
        padding: 2rem;
    }

    .user-menu {
        right: 1.5rem;
    }
}

/* ========== Auth Toggle & Forms ========== */
.auth-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    background: var(--bg-secondary);
    padding: 5px;
    border-radius: 8px;
}

.toggle-btn {
    flex: 1;
    padding: 10px 20px;
    background: #e5e7eb;
    border: none;
    border-radius: 6px;
    color: #6b7280;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.toggle-btn:hover {
    background: #d1d5db;
}

.toggle-btn.active {
    background: #9ca3af;
    color: white;
}

[data-theme="dark"] .toggle-btn {
    background: #374151;
    color: #9ca3af;
}

[data-theme="dark"] .toggle-btn:hover {
    background: #4b5563;
}

[data-theme="dark"] .toggle-btn.active {
    background: #6b7280;
    color: white;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 0.85rem;
}

.form-row .form-group {
    margin-bottom: 0;
}

.field-note, .form-note {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 3px;
}

.form-note {
    text-align: center;
    margin-top: 8px;
}

.form-note a {
    color: var(--primary-color);
    text-decoration: none;
}

.form-note a:hover {
    text-decoration: underline;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid #c3e6cb;
}

[data-theme="dark"] .success-message {
    background: #1e4620;
    color: #8fd99f;
    border-color: #2d5930;
}

/* ========== Verification Page ========== */
.verify-container {
    max-width: 500px;
    margin: 100px auto;
    padding: 40px;
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.verify-header {
    margin-bottom: 30px;
}

.verify-header .logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.verify-content {
    margin: 30px 0;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-secondary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========== Profile Edit Page ========== */
.profile-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.back-btn:hover {
    background: var(--hover-color);
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.form-section {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
}

.form-section h3 {
    margin: 0 0 20px 0;
    color: var(--text-primary);
    font-size: 18px;
}

.form-group-checkbox {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding-top: 20px;
}

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

.btn-secondary:hover {
    background: var(--hover-color);
}