/* ============================================
   HeryerGebe.com - Modern Pastel Redesign (v2)
   Renk Paleti: yumuşak gök mavisi + pastel gül + adaçayı
   Tasarım referansı: _research/DESIGN_SPEC.md
   NOT: Tüm class isimleri ve legacy CSS değişken isimleri KORUNUR
        (40 hafta + alt sayfalar otomatik güncellenir). Sadece değerler
        modernleşti. Yeni değişken/class isimleri eklendi.
   ============================================ */

:root {
    /* ---- Ana pastel tonlar (DESIGN_SPEC bölüm 1) ---- */
    --primary:        #7BA7CC;   /* yumuşak gök mavisi */
    --primary-dark:   #5E8BB3;   /* hover/koyu */
    --primary-light:  #B6D0E6;   /* açık mavi (legacy ad — korundu) */
    --primary-soft:   #DCEAF4;   /* açık mavi zemin */

    --accent:         #E8A0B0;   /* pastel gül pembesi */
    --accent-dark:    #D4889A;   /* koyu pembe */
    --accent-light:   #F4CAD3;   /* açık pembe (legacy ad — korundu) */
    --accent-soft:    #FBE6EB;   /* açık pembe zemin */

    --sage:           #A7C4A0;   /* adaçayı yeşili vurgu */
    --sage-soft:      #E8F0E4;

    --secondary:      #B6A6D8;   /* yumuşak lila (legacy ad — korundu, pastelleşti) */
    --secondary-soft: #EDE7F5;
    --tertiary:       #A7C4A0;   /* yeşil aksan = sage (legacy ad — korundu) */

    /* ---- Nötr / zemin ---- */
    --white:          #FFFFFF;
    --black:          #4A4550;   /* saf siyah DEĞİL — yumuşak koyu (legacy ad — korundu) */
    --bg:             #FFFFFF;
    --bg-primary:     #FFFFFF;
    --bg-secondary:   #FBF6F1;   /* krem (illüstrasyon zemini) */
    --bg-accent:      #FBE6EB;   /* açık pembe zemin */
    --bg-blue:        #DCEAF4;   /* açık mavi zemin (legacy ad — korundu) */
    --surface:        #FFFFFF;

    /* Gri skalası — pastel/yumuşak tonlara çekildi (legacy adlar korundu) */
    --gray-50:        #FBF8F5;
    --gray-100:       #F5F0EB;
    --gray-200:       #EFE7E0;   /* = --border (yumuşak çizgi) */
    --gray-300:       #DFD6CE;
    --gray-400:       #BDB4BC;
    --gray-500:       #A39EAA;
    --gray-600:       #7C7682;
    --gray-700:       #5E5866;
    --gray-800:       #4A4550;
    --gray-900:       #3A3640;

    /* ---- Metin (göz dostu — saf siyah YOK) ---- */
    --text:           #4A4550;
    --text-primary:   #4A4550;   /* legacy ad — korundu */
    --text-secondary: #7C7682;
    --text-muted:     #A39EAA;
    --text-inverse:   #FFFFFF;

    /* ---- Çizgi ---- */
    --border:         #EFE7E0;

    /* ---- Spacing (legacy adlar korundu) ---- */
    --spacing-xs:  0.25rem;
    --spacing-sm:  0.5rem;
    --spacing-md:  1rem;
    --spacing-lg:  1.5rem;
    --spacing-xl:  2rem;
    --spacing-xxl: 3rem;
    --spacing-xxxl: 5rem;        /* section nefesi büyütüldü (spec bölüm 3) */

    /* ---- Border radius (yumuşak köşeler — legacy + yeni adlar) ---- */
    --radius:      14px;
    --radius-sm:   10px;
    --radius-md:   14px;
    --radius-lg:   22px;
    --radius-xl:   30px;
    --radius-full: 9999px;

    /* ---- Gölgeler (yumuşak, mavi tonlu — legacy + yeni adlar) ---- */
    --shadow-sm:     0 2px 8px rgba(123,167,204,0.08);
    --shadow:        0 6px 20px rgba(123,167,204,0.10);
    --shadow-md:     0 6px 20px rgba(123,167,204,0.10);
    --shadow-lg:     0 14px 40px rgba(123,167,204,0.14);
    --shadow-xl:     0 18px 48px rgba(123,167,204,0.16);
    --shadow-accent: 0 8px 24px rgba(232,160,176,0.18);

    /* ---- Tipografi ---- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Poppins', var(--font-sans);

    --font-size-xs:  0.78rem;
    --font-size-sm:  0.9rem;
    --font-size-base: 1rem;
    --font-size-lg:  1.14rem;
    --font-size-xl:  1.3rem;
    --font-size-2xl: 1.6rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.4rem;
    --font-size-5xl: 3rem;

    /* ---- Geçişler (yumuşak ease) ---- */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    animation: pageFadeIn 0.4s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Erişilebilirlik: net focus halkası (a11y) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

::selection {
    background: var(--accent-soft);
    color: var(--text);
}

/* ============================================
   Container & Layout
   ============================================ */

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-xxxl) 0;   /* 5rem dikey nefes */
}

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

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Bölüm görseli (spec: section-illustration) */
.section-illustration {
    display: block;
    max-width: 320px;
    width: 100%;
    margin: 0 auto var(--spacing-lg) auto;
    filter: drop-shadow(var(--shadow));
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

/* Bazı alt sayfalar .header-content sarmalayıcısı kullanıyor */
.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--primary-dark);
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    flex-shrink: 0;
}

.nav {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    transition: color var(--transition-base), background var(--transition-base);
}

.nav-link:hover {
    color: var(--primary-dark);
    background: var(--primary-soft);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    background:
        radial-gradient(1100px 480px at 12% -8%, var(--primary-soft) 0%, transparent 60%),
        radial-gradient(900px 420px at 100% 0%, var(--accent-soft) 0%, transparent 55%),
        linear-gradient(135deg, var(--bg-secondary) 0%, #FFFFFF 100%);
    padding: clamp(3rem, 7vw, 6rem) 0;
    position: relative;
    overflow: hidden;
}

/* Dekoratif yumuşak blob (subtle, yavaş) */
.hero::before {
    content: '';
    position: absolute;
    width: 420px;
    height: 420px;
    right: -120px;
    bottom: -160px;
    background: radial-gradient(circle at 50% 50%, var(--sage-soft) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.7;
    z-index: 0;
    animation: blobDrift 16s ease-in-out infinite;
}

/* 2 sütun hero düzeni (spec bölüm 7) */
.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: clamp(2rem, 5vw, 4rem);
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 620px;
    position: relative;
    z-index: 1;
}

/* Tek sütun (eski) hero düzeni hâlâ ortalanır */
.hero > .container > .hero-content {
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.12;
}

.hero-description {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* Hero butonları yan yana */
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero > .container > .hero-content .hero-actions {
    justify-content: center;
}

/* Eski emoji ikon — küçültüldü/yumuşatıldı (logo SVG'ye geçiş Worker-C) */
.hero-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1;
}

/* Hero illüstrasyon (float animasyonlu) */
.hero-illustration {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(var(--shadow-lg));
}

/* Mini istatistikler */
.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.hero > .container > .hero-content .hero-stats {
    justify-content: center;
}

.hero-stats .hero-stat {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.hero-stats .hero-stat strong {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-dark);
}

.hero-stats .hero-stat span {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    padding: 0.8rem 1.7rem;
    border-radius: var(--radius-full);   /* pill (spec) */
    font-weight: 600;
    font-size: var(--font-size-base);
    line-height: 1.2;
    transition: transform var(--transition-base), background var(--transition-base),
                box-shadow var(--transition-base), border-color var(--transition-base),
                color var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* YENİ: outline ikincil buton (spec bölüm 7) */
.btn-secondary {
    background: transparent;
    color: var(--primary-dark);
    border-color: var(--primary);
}

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

.btn-secondary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

/* Kart içi yumuşak buton: parlak pembe spam'i azalt.
   Kart zaten tıklanabilir; karttaki .btn-primary'yi hafif/yumuşak yap. */
.calculator-card .btn-primary {
    background: var(--primary-soft);
    color: var(--primary-dark);
    border-color: transparent;
    box-shadow: none;
}

.calculator-card:hover .btn-primary {
    background: var(--primary);
    color: var(--white);
}

/* ============================================
   Calculator Cards
   ============================================ */

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
}

.calculator-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: transform var(--transition-base), box-shadow var(--transition-base),
                border-color var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.calculator-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.calculator-icon {
    width: 58px;
    height: 58px;
    background: var(--primary-soft);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-base), background var(--transition-base);
}

.calculator-card:hover .calculator-icon {
    transform: scale(1.08);
}

/* İkon kutusu pastel zemin dönüşümlü (spec: --primary-soft / --accent-soft) */
.calculator-grid > .calculator-card:nth-child(even) .calculator-icon {
    background: var(--accent-soft);
    color: var(--accent-dark);
}

.calculator-grid > .calculator-card:nth-child(3n) .calculator-icon {
    background: var(--sage-soft);
    color: #5E7B58;
}

.calculator-card h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    color: var(--text);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.calculator-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.65;
}

.calculator-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-top: var(--spacing-md);
}

/* ============================================
   Calculator Category Tabs (YENİ — Worker-B kullanacak)
   ============================================ */

.calc-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.calc-tab {
    padding: 0.55rem 1.25rem;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.calc-tab:hover {
    color: var(--primary-dark);
    border-color: var(--primary-light);
    background: var(--primary-soft);
}

.calc-tab.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* ============================================
   Quick Calculator Form
   ============================================ */

.quick-calculator {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xxl);
    color: var(--white);
    margin-top: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
}

.quick-calculator h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

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

.form-group label {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.form-input {
    padding: 0.8rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--font-size-base);
    background: var(--white);
    color: var(--text);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(123, 167, 204, 0.18);
}

/* ============================================
   Calculator Result
   ============================================ */

.calc-result {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--white);
    color: var(--text);
    display: none;
}

.calc-result.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.calc-result.success {
    border-left: 4px solid var(--sage);
}

.calc-result.error {
    border-left: 4px solid #E08A8A;
}

.calc-result.warning {
    border-left: 4px solid #E8C07B;
}

.calc-result h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.result-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius);
}

.result-item strong {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-dark);
}

/* ============================================
   Scroll Reveal (YENİ — js/animations.js ile)
   ============================================ */

/* JS yoksa .reveal görünür kalır (içerik kaybı önlenir); JS .js ekleyince gizlenip animasyona girer */
.js .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}

.js .reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* Kademeli gecikme (opsiyonel; Worker-B data-delay yerine class kullanabilir) */
.reveal.reveal-delay-1 { transition-delay: 0.08s; }
.reveal.reveal-delay-2 { transition-delay: 0.16s; }
.reveal.reveal-delay-3 { transition-delay: 0.24s; }

/* ============================================
   Animations / Keyframes
   ============================================ */

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

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

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

@keyframes blobDrift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%      { transform: translate(-24px, -18px) scale(1.08); }
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: #3F3A47;          /* yumuşak koyu mor-gri (saf siyah değil) */
    color: #CFC8D4;
    padding: var(--spacing-xxl) 0;
    margin-top: var(--spacing-xxxl);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-sm);
}

.footer a {
    transition: color var(--transition-base);
}

.disclaimer {
    font-size: var(--font-size-sm);
    color: #F0D9DE;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(232, 160, 176, 0.16);
    border-radius: var(--radius);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-xxl) 0;   /* 3rem mobil nefes */
    }

    .hero-grid {
        grid-template-columns: 1fr;       /* tek sütun */
        text-align: center;
    }

    /* Mobilde illüstrasyon üstte */
    .hero-grid .hero-illustration {
        order: -1;
        max-width: 340px;
    }

    .hero-content {
        margin: 0 auto;
    }

    .hero-actions,
    .hero-stats {
        justify-content: center;
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

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

    .calc-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: var(--spacing-xs);
        -webkit-overflow-scrolling: touch;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border);
        gap: var(--spacing-xs);
    }

    .nav.active {
        display: flex;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: var(--spacing-md);
    }

    .navbar,
    .header-content {
        position: relative;
    }

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

/* ============================================
   prefers-reduced-motion (a11y — spec bölüm 4 & 8)
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }
}