/* ===== Professional Minimalist Design ===== */
:root {
    /* Clean, Professional Color Palette - Light Mode */
    --bg-primary: #fafbfc;
    --bg-card: #ffffff;
    --bg-input: #f7f8fa;

    /* Accent Colors - Subtle & Professional */
    --accent-primary: #0066cc;
    --accent-secondary: #00a86b;
    --accent-light: rgba(0, 102, 204, 0.08);

    /* Text Colors */
    --text-dark: #1a1a2e;
    --text-body: #4a4a5a;
    --text-muted: #8a8a9a;
    --text-light: #ffffff;

    /* Borders & Shadows */
    --border-color: #e5e7eb;
    --border-focus: #0066cc;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

    /* Spacing & Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
}

/* ===== Dark Mode ===== */
body.dark-mode {
    --bg-primary: #0d1117;
    --bg-card: #161b22;
    --bg-input: #21262d;

    --accent-primary: #58a6ff;
    --accent-secondary: #3fb950;
    --accent-light: rgba(88, 166, 255, 0.15);

    --text-dark: #f0f6fc;
    --text-body: #c9d1d9;
    --text-muted: #8b949e;
    --text-light: #f0f6fc;

    --border-color: #30363d;
    --border-focus: #58a6ff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ===== Theme Toggle Button ===== */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
}

.theme-toggle:hover {
    background: var(--accent-light);
    border-color: var(--accent-primary);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

body.dark-mode .theme-toggle .sun-icon {
    display: block;
}

body.dark-mode .theme-toggle .moon-icon {
    display: none;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-body);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

/* ===== Hide Background Effects (Cleaner Look) ===== */
.background-effects {
    display: none;
}

/* ===== Container ===== */
.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 48px 24px;
    min-height: 100vh;
}

/* ===== Header ===== */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: -0.5px;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 400;
}

/* ===== Header Actions ===== */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ===== User Menu ===== */
.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-name {
    color: var(--text-body);
    font-size: 0.875rem;
    font-weight: 500;
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-body);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.logout-btn:hover {
    background: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

.login-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

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

/* Header Buttons - Unified styling */
.header-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    background: var(--bg-input);
    color: var(--text-body);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.header-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
    color: var(--text-dark);
}

.header-btn.login-btn {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.header-btn.login-btn:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.header-btn.danger {
    color: #dc2626;
}

.header-btn.danger:hover {
    background: #fef2f2;
    border-color: #fecaca;
}

/* ===== Main Card ===== */
.main-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

/* ===== Progress Steps ===== */
.progress-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    padding: 0 20px;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.4;
    transition: var(--transition);
}

.progress-step.active,
.progress-step.completed {
    opacity: 1;
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.progress-step.active .step-number {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-light);
}

.progress-step.completed .step-number {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
    color: white;
}

.step-label {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress-line {
    width: 60px;
    height: 2px;
    background: var(--border-color);
    margin-bottom: 20px;
}

/* ===== Form Steps ===== */
.form-step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.form-step.active {
    display: block;
}

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

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

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.step-subtitle {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 0.95rem;
}

/* ===== Form Elements ===== */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    letter-spacing: 0.2px;
}

input[type="number"],
input[type="text"],
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-card);
    color: var(--text-dark);
    box-shadow: 0 0 0 3px var(--accent-light);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238a8a9a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

select option {
    background: var(--bg-card);
    color: var(--text-dark);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* ===== Disclaimer Box ===== */
.disclaimer-box {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 28px;
}

.disclaimer-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.disclaimer-box p {
    color: #92400e;
    font-size: 0.875rem;
    line-height: 1.5;
}

.disclaimer-box strong {
    color: #78350f;
}

/* ===== Radio Cards ===== */
.radio-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.radio-cards.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.radio-card {
    cursor: pointer;
}

.radio-card input {
    display: none;
}

.radio-card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.radio-card input:checked+.radio-card-content {
    border-color: var(--accent-primary);
    background: var(--accent-light);
}

.radio-icon {
    font-size: 1.5rem;
}

.radio-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-dark);
}

.radio-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

/* ===== Checkbox Grid ===== */
.checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.checkbox-item {
    cursor: pointer;
}

.checkbox-item input {
    display: none;
}

.checkbox-label {
    display: inline-block;
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-body);
    transition: var(--transition);
}

.checkbox-item input:checked+.checkbox-label {
    background: var(--accent-light);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    font-weight: 500;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: #0052a3;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.btn-generate {
    width: 100%;
    padding: 16px 28px;
    font-size: 1rem;
    background: var(--accent-secondary);
}

.btn-generate:hover {
    background: #008a57;
}

.btn-arrow {
    transition: transform 0.2s ease;
}

.btn:hover .btn-arrow {
    transform: translateX(3px);
}

.prev-btn:hover .btn-arrow {
    transform: translateX(-3px);
}

/* ===== Loading State ===== */
.loading-state {
    text-align: center;
    padding: 80px 20px;
}

.loader {
    position: relative;
    width: 48px;
    height: 48px;
    margin: 0 auto 32px;
}

.loader-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    animation: spin 1s linear infinite;
}

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

.loading-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.loading-state p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    max-width: 400px;
    margin: 24px auto 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(67, 206, 162, 0.2);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #43cea2 0%, #185a9d 100%);
    border-radius: 10px;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary);
}


/* ===== Result State ===== */
.result-state {
    animation: fadeIn 0.4s ease;
}

.result-header {
    text-align: center;
    margin-bottom: 32px;
}

.success-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 16px;
}

.result-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.diet-plan-content {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px;
    margin-bottom: 24px;
    overflow-y: auto;

    /* Disable text selection/copying */
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;

    /* Professional report styling */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.8;
    color: #2c3e50;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.diet-plan-content h1,
.diet-plan-content h2,
.diet-plan-content h3 {
    color: var(--text-dark);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

.diet-plan-content h1:first-child,
.diet-plan-content h2:first-child,
.diet-plan-content h3:first-child {
    margin-top: 0;
}

.diet-plan-content p {
    margin-bottom: 1em;
    color: var(--text-body);
}

.diet-plan-content strong {
    color: var(--accent-primary);
}

.diet-plan-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.875rem;
}

.diet-plan-content th,
.diet-plan-content td {
    padding: 12px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.diet-plan-content th {
    background: var(--bg-input);
    color: var(--text-dark);
    font-weight: 600;
}

.diet-plan-content tr:nth-child(even) {
    background: var(--bg-input);
}

.diet-plan-content ul,
.diet-plan-content ol {
    margin: 1em 0;
    padding-left: 1.5em;
}

.diet-plan-content li {
    margin-bottom: 0.5em;
    color: var(--text-body);
}

.result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* ===== Error State ===== */
.error-state {
    text-align: center;
    padding: 80px 20px;
}

.error-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 16px;
}

.error-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #dc2626;
    margin-bottom: 8px;
}

.error-state p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 32px 0 16px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer p {
    margin-bottom: 4px;
}

.footer strong {
    color: var(--accent-primary);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 1;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
    display: none;
}

.modal-content {
    background: var(--bg-card);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border-color);
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.75rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--text-dark);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
}

/* History List Styles */
.plan-item {
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-input);
}

.plan-item:hover {
    border-color: var(--accent-primary);
    background: var(--bg-card);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.plan-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.plan-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.plan-title {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

.plan-preview {
    font-size: 0.9rem;
    color: var(--text-body);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.loading-spinner {
    border: 3px solid var(--bg-input);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .container {
        padding: 24px 16px;
    }

    .main-card {
        padding: 28px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .radio-cards,
    .radio-cards.three-col {
        grid-template-columns: 1fr;
    }

    .progress-container {
        gap: 0;
    }

    .progress-line {
        width: 32px;
    }

    .step-label {
        font-size: 0.6rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .result-actions {
        flex-direction: column;
    }

    .header-top {
        flex-direction: column;
        gap: 12px;
    }
}

/* ===== Scrollbar ===== */
.diet-plan-content::-webkit-scrollbar {
    width: 6px;
}

.diet-plan-content::-webkit-scrollbar-track {
    background: var(--bg-input);
    border-radius: 3px;
}

.diet-plan-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.diet-plan-content::-webkit-scrollbar-thumb:hover {
    background: #c5c5c5;
}