/* ================================================================
   AYTEM KURUMSAL — ANA CSS SİSTEMİ
   Google Fonts: Inter + Plus Jakarta Sans
   Renk Paleti: Marka mavi (#009fe3) + Lacivert (#1a2e45)
================================================================ */

/* Google Fonts: header.php'de <link> ile yükleniyor — çift yükleme önlemek için burada @import yok */

/* --- CSS Değişken Sistemi --- */
:root {
    /* Birincil Renkler */
    --color-primary:        #009fe3;
    --color-primary-dark:   #0082c0;
    --color-primary-light:  #33b5ea;
    --color-primary-ghost:  rgba(0, 159, 227, 0.08);
    --color-primary-soft:   rgba(0, 159, 227, 0.15);

    /* İkincil / Dark Renkler */
    --color-dark:           #1a2e45;
    --color-dark-mid:       #2d3e50;
    --color-dark-soft:      #3d5166;

    /* Nötr Renkler */
    --color-white:          #ffffff;
    --color-bg:             #f4f7fb;
    --color-bg-alt:         #eef2f7;
    --color-surface:        #ffffff;
    --color-surface-alt:    #f8fafd;
    --color-border:         #e2e8f0;
    --color-border-light:   #edf2f7;

    /* Metin Renkleri */
    --color-text:           #1e293b;
    --color-text-muted:     #64748b;
    --color-text-light:     #94a3b8;
    --color-text-white:     #f8fafc;

    /* Durum Renkleri */
    --color-success:        #10b981;
    --color-warning:        #f59e0b;
    --color-error:          #ef4444;

    /* Tipografi */
    --font-body:            'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading:         'Plus Jakarta Sans', 'Inter', sans-serif;

    --font-size-xs:         0.75rem;    /* 12px */
    --font-size-sm:         0.875rem;   /* 14px */
    --font-size-base:       1rem;       /* 16px */
    --font-size-md:         1.125rem;   /* 18px */
    --font-size-lg:         1.25rem;    /* 20px */
    --font-size-xl:         1.5rem;     /* 24px */
    --font-size-2xl:        1.875rem;   /* 30px */
    --font-size-3xl:        2.25rem;    /* 36px */
    --font-size-4xl:        3rem;       /* 48px */
    --font-size-5xl:        3.75rem;    /* 60px */

    --font-weight-light:    300;
    --font-weight-regular:  400;
    --font-weight-medium:   500;
    --font-weight-semibold: 600;
    --font-weight-bold:     700;
    --font-weight-extrabold:800;

    --line-height-tight:    1.25;
    --line-height-snug:     1.375;
    --line-height-normal:   1.6;
    --line-height-relaxed:  1.75;

    /* Spacing */
    --space-1:  0.25rem;    /* 4px */
    --space-2:  0.5rem;     /* 8px */
    --space-3:  0.75rem;    /* 12px */
    --space-4:  1rem;       /* 16px */
    --space-5:  1.25rem;    /* 20px */
    --space-6:  1.5rem;     /* 24px */
    --space-8:  2rem;       /* 32px */
    --space-10: 2.5rem;     /* 40px */
    --space-12: 3rem;       /* 48px */
    --space-16: 4rem;       /* 64px */
    --space-20: 5rem;       /* 80px */
    --space-24: 6rem;       /* 96px */
    --space-32: 8rem;       /* 128px */

    /* Border Radius */
    --radius-sm:    0.375rem;   /* 6px */
    --radius-md:    0.5rem;     /* 8px */
    --radius-lg:    0.75rem;    /* 12px */
    --radius-xl:    1rem;       /* 16px */
    --radius-2xl:   1.5rem;     /* 24px */
    --radius-full:  9999px;

    /* Gölgeler */
    --shadow-xs:    0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm:    0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md:    0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg:    0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl:    0 20px 25px rgba(0,0,0,0.08), 0 10px 10px rgba(0,0,0,0.04);
    --shadow-2xl:   0 25px 50px rgba(0,0,0,0.12);
    --shadow-primary: 0 8px 25px rgba(0, 159, 227, 0.25);
    --shadow-primary-lg: 0 12px 35px rgba(0, 159, 227, 0.35);

    /* Geçişler */
    --transition-fast:      all 0.15s ease;
    --transition-base:      all 0.25s ease;
    --transition-slow:      all 0.4s ease;
    --transition-spring:    all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Layout */
    --container-max:        1200px;
    --container-width:      90%;

    /* Z-Index Katmanları */
    --z-base:       1;
    --z-dropdown:   100;
    --z-sticky:     200;
    --z-header:     1000;
    --z-overlay:    1100;
    --z-modal:      1200;
    --z-toast:      1300;
    --z-whatsapp:   999;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Temel Elementler --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

p {
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed);
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: var(--font-body);
    border: none;
    background: none;
}

input, textarea, select {
    font-family: var(--font-body);
}

/* --- Container --- */
.container {
    width: var(--container-width);
    max-width: var(--container-max);
    margin: 0 auto;
}

/* --- Section Başlık Düzeni --- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--color-primary-ghost);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    color: var(--color-dark);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    max-width: 620px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

/* --- Dekoratif Alt Çizgi --- */
.section-title::after,
.title-underline::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    margin: var(--space-4) auto 0;
}

.section-header.left-align .section-subtitle,
.section-header.left-align .section-title {
    text-align: left;
}

.section-header.left-align .section-title::after {
    margin-left: 0;
}

/* --- Buton Sistemi --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-body);
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), #006fa0);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary-lg);
}

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

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

.btn-dark {
    background: var(--color-dark);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-dark:hover {
    background: var(--color-dark-mid);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-ghost {
    background: rgba(255,255,255,0.15);
    color: var(--color-white);
    border-color: rgba(255,255,255,0.4);
    backdrop-filter: blur(8px);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.25);
    color: var(--color-white);
    border-color: rgba(255,255,255,0.7);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background: linear-gradient(135deg, #25d366, #128c7e);
    color: var(--color-white);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    background: linear-gradient(135deg, #1ebe5a, #0f7a6e);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(37, 211, 102, 0.4);
}

.btn-contact {
    background: linear-gradient(135deg, var(--color-dark), var(--color-dark-mid));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-contact:hover {
    background: linear-gradient(135deg, var(--color-dark-mid), var(--color-dark-soft));
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: var(--font-size-md);
    border-radius: var(--radius-xl);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
}

/* Eski CTA butonu (geriye dönük uyumluluk) */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: var(--transition-base);
    box-shadow: var(--shadow-primary);
}

.cta-button:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), #006fa0);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary-lg);
}

/* --- Kart Sistemi --- */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-soft);
}

/* --- Badge / Etiket --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: var(--color-primary-ghost);
    color: var(--color-primary-dark);
}

.badge-dark {
    background: rgba(26, 46, 69, 0.08);
    color: var(--color-dark);
}

/* --- Scroll Reveal Animasyonları --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Divider --- */
.divider {
    width: 100%;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-8) 0;
}

/* --- Yardımcı Sınıflar --- */
.text-center  { text-align: center; }
.text-left    { text-align: left; }
.text-primary { color: var(--color-primary); }
.text-dark    { color: var(--color-dark); }
.text-muted   { color: var(--color-text-muted); }
.text-white   { color: var(--color-white); }

.fw-medium    { font-weight: var(--font-weight-medium); }
.fw-semibold  { font-weight: var(--font-weight-semibold); }
.fw-bold      { font-weight: var(--font-weight-bold); }

.d-flex       { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-2        { gap: var(--space-2); }
.gap-4        { gap: var(--space-4); }

.mb-0  { margin-bottom: 0; }
.mb-4  { margin-bottom: var(--space-4); }
.mb-8  { margin-bottom: var(--space-8); }
.mt-8  { margin-top: var(--space-8); }

/* --- Responsive Temel --- */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 3.25rem;
        --font-size-4xl: 2.75rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2.25rem;
        --font-size-3xl: 1.875rem;
    }

    .container {
        --container-width: 95%;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.5rem;
    }
}