/* ============================================
   PSİKOLOG WEB SİTESİ - DESIGN SYSTEM
   Minimalist, profesyonel, temiz tasarım
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* ━━━ COLOR PALETTE (Minimalist Professional) ━━━ */
    /* Primary - Koyu Mavi-Gri (başlıklar, vurgular) */
    --color-primary: #2c3e50;
    --color-primary-light: #34495e;
    --color-primary-dark: #1a252f;

    /* Secondary - Orta Gri (ikincil elementler) */
    --color-secondary: #7f8c8d;
    --color-secondary-light: #95a5a6;
    --color-secondary-dark: #6c7a7b;

    /* Accent - Subtle Mavi (linkler, hover) */
    --color-accent: #3498db;
    --color-accent-light: #5dade2;
    --color-accent-dark: #2980b9;

    /* Neutral Palette (Clean Whites & Grays) */
    --color-neutral-50: #ffffff;
    /* Pure white */
    --color-neutral-100: #f8f9fa;
    /* Very light gray */
    --color-neutral-200: #e9ecef;
    /* Light gray */
    --color-neutral-300: #dee2e6;
    /* Medium light gray */
    --color-neutral-400: #ced4da;
    /* Medium gray */
    --color-neutral-600: #6c757d;
    /* Dark gray */
    --color-neutral-800: #343a40;
    /* Very dark gray */
    --color-neutral-900: #212529;
    /* Almost black */

    /* Semantic Colors */
    --color-success: #27ae60;
    --color-warning: #f39c12;
    --color-error: #e74c3c;
    --color-info: var(--color-accent);


    /* ━━━ TYPOGRAPHY ━━━ */
    --font-primary: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
    --font-heading: 'Libre Baskerville', Georgia, 'Times New Roman', serif;

    /* Font Sizes (Refined Type Scale) */
    --text-xs: 0.75rem;
    /* 12px */
    --text-sm: 0.875rem;
    /* 14px */
    --text-base: 1rem;
    /* 16px */
    --text-lg: 1.125rem;
    /* 18px */
    --text-xl: 1.25rem;
    /* 20px */
    --text-2xl: 1.5rem;
    /* 24px */
    --text-3xl: 1.875rem;
    /* 30px */
    --text-4xl: 2.25rem;
    /* 36px */
    --text-5xl: 3rem;
    /* 48px */

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* ━━━ SPACING (8px grid) ━━━ */
    --space-xs: 0.5rem;
    /* 8px */
    --space-sm: 1rem;
    /* 16px */
    --space-md: 1.5rem;
    /* 24px */
    --space-lg: 2rem;
    /* 32px */
    --space-xl: 3rem;
    /* 48px */
    --space-2xl: 4rem;
    /* 64px */
    --space-3xl: 6rem;
    /* 96px */

    /* ━━━ BORDER RADIUS (More subtle) ━━━ */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --radius-full: 9999px;

    /* ━━━ SHADOWS (Very subtle) ━━━ */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-inner: inset 0 1px 3px rgba(0, 0, 0, 0.05);

    /* ━━━ TRANSITIONS ━━━ */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;

    /* ━━━ Z-INDEX ━━━ */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 500;
    --z-toast: 1000;

    /* ━━━ BREAKPOINTS (for reference in JS) ━━━ */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-neutral-900);
    background-color: var(--color-neutral-50);
    /* Pure white background */
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    color: var(--color-neutral-900);
    margin-bottom: var(--space-sm);
}

h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

h6 {
    font-size: var(--text-base);
}

p {
    margin-bottom: var(--space-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-neutral-800);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-accent-dark);
    text-decoration: underline;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button (Ana CTA) */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary-dark);
    border-color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-dark);
}

/* Ghost Button (minimal) */
.btn-ghost {
    background-color: transparent;
    color: var(--color-neutral-800);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-neutral-100);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-lg);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-neutral-800);
}

.form-label.required::after {
    content: " *";
    color: var(--color-error);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-sm);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-neutral-900);
    background-color: white;
    border: 1px solid var(--color-neutral-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(168, 207, 219, 0.15);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--color-error);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    cursor: pointer;
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
    margin-top: 0.25rem;
    cursor: pointer;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

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

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-sm);
    color: var(--color-neutral-900);
}

.card-description {
    font-size: var(--text-base);
    color: var(--color-neutral-600);
    line-height: var(--leading-relaxed);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

.section {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
    text-align: center;
}

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

.text-right {
    text-align: right;
}

.mt-0 {
    margin-top: 0;
}

.mt-xs {
    margin-top: var(--space-xs);
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-xs {
    margin-bottom: var(--space-xs);
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-neutral-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }

    .section {
        padding-top: var(--space-2xl);
        padding-bottom: var(--space-2xl);
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 640px) {

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}