/*
Theme Name: Bilge Keskin Mimarlık
Theme URI: https://bilgekeskin.com
Description: Teğet Mimarlık ilhamlı, minimalist ve prestijli WordPress mimarlık teması.
Author: Antigravity AI
Author URI: https://bilgekeskin.com
Version: 1.0.0
License: GNU General Public License v2 or later
Text Domain: bilge-keskin
*/

/* ==========================================================================
   DESIGN TOKENS & VARIABLE DEFINITIONS
   ========================================================================== */
:root {
    /* Color Palette derived from Logo & Slate Grays */
    --bk-anthracite: #272b30;
    --bk-anthracite-dark: #1b1e22;
    --bk-slate: #4a515a;
    --bk-slate-light: #717882;
    --bk-border: #e5e7eb;
    --bk-border-dark: #d1d5db;
    --bk-bg-light: #f8f9fa;
    --bk-bg-subtle: #f3f4f6;
    --bk-white: #ffffff;
    
    /* Typography */
    --font-main: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing & Layout */
    --site-max-width: 1440px;
    --header-height: 90px;
    --section-gap: 80px;
    --border-radius: 4px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-main);
    font-weight: 400;
    color: var(--bk-anthracite);
    background-color: var(--bk-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

ul, ol {
    list-style: none;
}

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

.bk-container {
    max-width: var(--site-max-width);
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .bk-container {
        padding: 0 20px;
    }
}

/* ==========================================================================
   HEADER & NAVIGATION (Teğet.com Minimalist Style)
   ========================================================================== */
.bk-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--bk-border);
    z-index: 1000;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.bk-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo Area */
.bk-logo-link {
    display: flex;
    align-items: center;
    gap: 16px;
}

.bk-logo-mark {
    width: 48px;
    height: 48px;
    background-color: var(--bk-anthracite);
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 6px 8px;
    position: relative;
    clip-path: polygon(0 0, 100% 0, 100% 32%, 36% 32%, 36% 100%, 0 100%);
}

.bk-logo-mark-text {
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 14px;
    color: var(--bk-white);
    line-height: 1;
    letter-spacing: -0.5px;
    position: absolute;
    bottom: 8px;
    left: 8px;
}

.bk-logo-text {
    display: flex;
    flex-direction: column;
}

.bk-logo-title {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
    line-height: 1.2;
}

.bk-logo-subtitle {
    font-weight: 300;
    font-size: 15px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--bk-slate);
    line-height: 1.2;
}

/* Menu Area */
.bk-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.bk-menu {
    display: flex;
    align-items: center;
    gap: 28px;
}

.bk-menu-item a {
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.8px;
    color: var(--bk-slate);
    position: relative;
    padding: 8px 0;
}

.bk-menu-item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1.5px;
    background-color: var(--bk-anthracite);
    transition: width var(--transition-fast);
}

.bk-menu-item a:hover,
.bk-menu-item.current-menu-item a {
    color: var(--bk-anthracite);
}

.bk-menu-item a:hover::after,
.bk-menu-item.current-menu-item a::after {
    width: 100%;
}

.bk-nav-tools {
    display: flex;
    align-items: center;
    gap: 20px;
    padding-left: 20px;
    border-left: 1px solid var(--bk-border);
}

.bk-lang-switch {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--bk-slate);
}

.bk-search-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--bk-anthracite);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    transition: transform var(--transition-fast);
}

.bk-search-btn:hover {
    transform: scale(1.1);
}

/* Mobile Hamburger Toggle */
.bk-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
}

.bk-hamburger span {
    width: 100%;
    height: 2px;
    background-color: var(--bk-anthracite);
    transition: all var(--transition-fast);
}

@media (max-width: 1024px) {
    .bk-nav {
        display: none;
    }
    .bk-hamburger {
        display: flex;
    }
}

/* Mobile Menu Drawer */
.bk-mobile-drawer {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--bk-white);
    padding: 40px 20px;
    transform: translateX(100%);
    transition: transform var(--transition-smooth);
    z-index: 999;
    overflow-y: auto;
}

.bk-mobile-drawer.active {
    transform: translateX(0);
}

.bk-mobile-menu {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.bk-mobile-menu a {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
}

/* ==========================================================================
   HERO / FEATURED PROJECT VISUAL (Taslak Tasarımı)
   ========================================================================== */
.bk-hero-section {
    padding: 40px 0 60px;
}

.bk-hero-visual-box {
    width: 100%;
    height: 70vh;
    min-height: 480px;
    max-height: 720px;
    background-color: #c4d1c9; /* Taslaktaki ikonik pastel mimari yeşil-gri tonu */
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.05);
}

.bk-hero-visual-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.bk-hero-visual-box:hover img {
    transform: scale(1.03);
}

.bk-hero-placeholder-text {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bk-slate);
    opacity: 0.8;
}

.bk-hero-caption {
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bk-hero-project-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--bk-slate);
}

.bk-hero-project-meta {
    font-size: 12px;
    letter-spacing: 1.5px;
    color: var(--bk-slate-light);
    text-transform: uppercase;
}

/* ==========================================================================
   PROJECTS GRID (Teğet.com Architectural Showcase)
   ========================================================================== */
.bk-section-header {
    margin-bottom: 40px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    border-bottom: 1px solid var(--bk-border);
    padding-bottom: 16px;
}

.bk-section-title {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
}

.bk-filter-tabs {
    display: flex;
    gap: 20px;
}

.bk-filter-btn {
    background: none;
    border: none;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--bk-slate-light);
    cursor: pointer;
    padding-bottom: 4px;
    transition: color var(--transition-fast);
}

.bk-filter-btn:hover,
.bk-filter-btn.active {
    color: var(--bk-anthracite);
}

.bk-projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 30px;
    margin-bottom: 80px;
}

@media (max-width: 1024px) {
    .bk-projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .bk-projects-grid {
        grid-template-columns: 1fr;
    }
}

.bk-project-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    group;
}

.bk-project-thumb {
    width: 100%;
    aspect-ratio: 4 / 3;
    background-color: var(--bk-bg-subtle);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--bk-border);
}

.bk-project-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.bk-project-card:hover .bk-project-thumb img {
    transform: scale(1.05);
}

.bk-project-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bk-project-name {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
    transition: color var(--transition-fast);
}

.bk-project-card:hover .bk-project-name {
    color: var(--bk-slate);
}

.bk-project-location-year {
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--bk-slate-light);
    text-transform: uppercase;
}

/* ==========================================================================
   PHILOSOPHY / ABOUT HIGHLIGHT SECTION
   ========================================================================== */
.bk-philosophy-section {
    background-color: var(--bk-bg-light);
    padding: 100px 0;
    border-top: 1px solid var(--bk-border);
    border-bottom: 1px solid var(--bk-border);
    margin-bottom: 80px;
}

.bk-philosophy-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.bk-philosophy-subtitle {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bk-slate-light);
    margin-bottom: 24px;
}

.bk-philosophy-text {
    font-size: 26px;
    font-weight: 300;
    line-height: 1.6;
    color: var(--bk-anthracite);
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .bk-philosophy-text {
        font-size: 20px;
    }
}

/* ==========================================================================
   FOOTER (Minimalist Architectural Finish)
   ========================================================================== */
.bk-footer {
    background-color: var(--bk-white);
    border-top: 1px solid var(--bk-border);
    padding: 60px 0 40px;
}

.bk-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

@media (max-width: 768px) {
    .bk-footer-grid {
        grid-template-columns: 1fr;
    }
}

.bk-footer-brand-title {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
    margin-bottom: 12px;
}

.bk-footer-text {
    font-size: 13px;
    color: var(--bk-slate);
    max-width: 360px;
    line-height: 1.7;
}

.bk-footer-col-title {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
    margin-bottom: 16px;
}

.bk-footer-links li {
    margin-bottom: 10px;
}

.bk-footer-links a {
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--bk-slate);
}

.bk-footer-links a:hover {
    color: var(--bk-anthracite);
}

.bk-footer-bottom {
    border-top: 1px solid var(--bk-border);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--bk-slate-light);
    text-transform: uppercase;
}

/* ==========================================================================
   PAGE SPECIFIC & FORM STYLES
   ========================================================================== */
.bk-page-header {
    padding: 60px 0 40px;
    border-bottom: 1px solid var(--bk-border);
    margin-bottom: 60px;
}

.bk-page-title {
    font-size: 28px;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bk-anthracite);
}

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

.bk-form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--bk-slate);
    margin-bottom: 8px;
}

.bk-form-input,
.bk-form-textarea {
    width: 100%;
    padding: 14px 18px;
    background-color: var(--bk-bg-light);
    border: 1px solid var(--bk-border);
    border-radius: var(--border-radius);
    color: var(--bk-anthracite);
    outline: none;
    transition: border-color var(--transition-fast);
}

.bk-form-input:focus,
.bk-form-textarea:focus {
    border-color: var(--bk-anthracite);
    background-color: var(--bk-white);
}

.bk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background-color: var(--bk-anthracite);
    color: var(--bk-white);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.bk-btn:hover {
    background-color: var(--bk-slate);
}