/**
 * =================================================================================
 * PROJE ADI: Nuvu Zenith
 * DOSYA ADI: public/assets/css/auth_layout.css
 * AMACI: auth_layout şablonuna özel genel stil kurallarını barındırır.
 * ---------------------------------------------------------------------------------
 * SAHİBİ : Recep Gülşen
 * GELİŞTİRİCİ: Dostun Gemini
 * OLUŞTURMA : 13 Ekim 2025
 * ---------------------------------------------------------------------------------
 * SON REVİZYON AÇIKLAMASI: GitHub Styling (Primer Design System) entegrasyonu.
 * =================================================================================
 */

:root {
    /* GitHub Primer Color System Variables */
    --color-canvas-default: #ffffff;
    --color-canvas-subtle: #f6f8fa;
    --color-border-default: #d0d7de;
    --color-border-muted: #d8dee4;
    --color-fg-default: #1f2328;
    --color-fg-muted: #636c76;
    --color-accent-fg: #0969da;
    --color-accent-emphasis: #0969da;
    
    /* Buttons */
    --color-btn-text: #24292f;
    --color-btn-bg: #f6f8fa;
    --color-btn-border: rgba(27, 31, 36, 0.15);
    --color-btn-hover-bg: #f3f4f6;
    --color-btn-hover-border: rgba(27, 31, 36, 0.15);
    --color-btn-primary-bg: #1f883d;
    --color-btn-primary-border: rgba(27, 31, 36, 0.15);
    --color-btn-primary-text: #ffffff;
    --color-btn-primary-hover-bg: #1a7f37;
    
    /* Header/Nav */
    --color-header-bg: #24292f;
    --color-header-text: #ffffff;
    --color-header-logo: #ffffff;
}

body {
    /* GitHub System Font Stack */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    /* Font Smoothing */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;

    background-color: var(--color-canvas-default);
    color: var(--color-fg-default);
    font-size: 14px;
    line-height: 1.5;
}

/* Typography Constants */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-fg-default);
    font-weight: 600;
}

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

a:hover {
    text-decoration: underline;
}

/* Utility Overrides for GitHub Feel */
.bg-light {
    background-color: var(--color-canvas-subtle) !important;
}

.text-secondary, .text-muted {
    color: var(--color-fg-muted) !important;
}

.border-light {
    border-color: var(--color-border-default) !important;
}

.border {
    border-color: var(--color-border-default) !important;
}

/* Button Refinements */
.btn {
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    padding: 5px 16px;
    line-height: 20px;
    transition: .2s cubic-bezier(0.3, 0, 0.5, 1);
    border: 1px solid;
}

.btn-primary, .btn-auth-primary {
    color: var(--color-btn-primary-text);
    background-color: var(--color-btn-primary-bg);
    border-color: var(--color-btn-primary-border);
    box-shadow: 0 1px 0 rgba(27,31,36,0.1);
}

.btn-primary:hover, .btn-auth-primary:hover {
    background-color: var(--color-btn-primary-hover-bg);
    border-color: var(--color-btn-primary-border);
}

.btn-light, .btn-white {
    color: var(--color-btn-text);
    background-color: var(--color-btn-bg);
    border-color: var(--color-btn-border);
    box-shadow: 0 1px 0 rgba(27,31,36,0.04);
}

.btn-light:hover {
    background-color: var(--color-btn-hover-bg);
    border-color: var(--color-btn-hover-border);
}

.hero-gradient {
    background: linear-gradient(180deg, var(--color-canvas-subtle) 0%, var(--color-canvas-default) 100%);
}

.section-title {
    color: var(--color-fg-default);
}

.section-subtitle {
    font-size: 20px;
    color: var(--color-fg-muted);
}

.header-transparent {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-default);
}

#scrollTopBtn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    z-index: 100;
}

/* nuvu Logo Yazısı */
.char-n { color: #1A73E8; text-shadow: none; }
.char-u1 { color: #D93025; text-shadow: none; }
.char-v { color: #1E8E3E; text-shadow: none; }
.char-u2 { color: #E97200; text-shadow: none; }

.nuvu-text {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif !important;
    font-weight: 600;
    line-height: 1;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    letter-spacing: -0.5px;
}

/* =========================================
   FOOTER STYLES
   ========================================= */
.footer-wrapper {
    margin-top: 40px;
    position: relative;
    background-color: var(--color-canvas-subtle);
    border-top: 1px solid var(--color-border-default);
    color: var(--color-fg-muted);
    background-image: none; /* Removed background image for clean look */
}

.footer-overlay {
    background: none;
    width: 100%;
    height: 100%;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.footer-title {
    color: var(--color-fg-default);
    font-weight: 600;
    margin-bottom: 12px;
    text-shadow: none;
}

.footer-link {
    color: var(--color-fg-muted);
    transition: all 0.2s ease;
    text-shadow: none;
    font-size: 13px;
}

.footer-link:hover {
    color: var(--color-accent-fg);
    text-decoration: underline;
    padding-left: 0; /* Removed movement */
}

.social-icon-btn {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background-color: transparent;
    color: var(--color-fg-muted);
    transition: all 0.2s ease;
    text-decoration: none;
    backdrop-filter: none;
    border: 1px solid var(--color-border-default);
}

.social-icon-btn:hover {
    background-color: var(--color-btn-hover-bg);
    transform: none;
    color: var(--color-fg-default);
    box-shadow: none;
    border-color: var(--color-border-muted);
}

/* Yukarı Çık Butonu (Güncellendi) */
#scrollTopBtn {
    width: 40px;
    height: 40px;
    bottom: 20px;
    right: 20px;
    background-color: var(--color-btn-bg);
    color: var(--color-fg-muted);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
}

/* =========================================
   AUTH BUTTON STYLES (giris.php, kayit.php)
   ========================================= */

/* Google Giriş Butonu */
.btn-google {
    background-color: #fff;
    color: var(--color-fg-default);
    border: 1px solid var(--color-border-default);
    transition: background-color 0.2s cubic-bezier(0.3, 0, 0.5, 1);
}

.btn-google:hover {
    background-color: #f3f4f6;
    box-shadow: none;
    transform: none;
}

/* Kayıt Ol / Başarılı Butonu (Green) */
.btn-auth-success {
    background-color: var(--color-btn-primary-bg);
    border-color: var(--color-btn-primary-border);
    color: #fff;
}

.btn-auth-success:hover,
.btn-auth-success:focus {
    background-color: var(--color-btn-primary-hover-bg);
}

/* Form Input Focus Effects */
.form-control {
    background-color: var(--color-canvas-default);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
    color: var(--color-fg-default);
    font-size: 14px;
    padding: 5px 12px;
    box-shadow: inset 0 1px 2px rgba(27,31,36,0.075);
}

.form-control:focus {
    border-color: var(--color-accent-fg);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
    outline: none;
}

/* Mobile aesthetics tweaks */
@media (max-width: 576px) {
    .card {
        border-radius: 6px !important;
    }
}