/* ============================================
   STYLE.CSS - Main Styles
   Çerçeve Atölyesi Premium Website
   ============================================ */

/* ============================================
   CSS VARIABLES
   ============================================ */

:root {
    /* Colors */
    --color-primary: #C9A959;
    --color-primary-light: #E8D39F;
    --color-primary-dark: #B89849;
    --color-dark: #1a1a1a;
    --color-gray: #666;
    --color-light-gray: #f5f5f5;
    --color-white: #ffffff;
    --color-border: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-white);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

/* ============================================
   CONTAINER
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   SKIP LINK
   ============================================ */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px 16px;
    z-index: 1000;
    text-decoration: none;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 300;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.header__logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-dark);
}

.header__logo-img {
    height: 110px;
    width: auto;
}

.header__nav {
    display: flex;
    align-items: center;
}

.header__nav-list {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.header__nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-dark);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 8px;
    transition: var(--transition);
}

.header__nav-link:hover {
    color: var(--color-primary);
    background: rgba(201, 169, 89, 0.1);
}

.header__menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-xs);
    cursor: pointer;
}

.header__menu-icon {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
    display: block;
}

.header__menu-icon::before,
.header__menu-icon::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.header__menu-icon::before {
    transform: translateY(-8px);
}

.header__menu-icon::after {
    transform: translateY(6px);
}

/* ============================================
   SECTION HEADER
   ============================================ */

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

.section-header__title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.section-header__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 14px 32px;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: 0 4px 16px rgba(201, 169, 89, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(201, 169, 89, 0.4);
}

.btn--secondary {
    background: var(--color-white);
    color: var(--color-dark);
    border: 2px solid rgba(0, 0, 0, 0.1);
}

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

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
    padding: 100px 0;
    background: var(--color-white);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about__image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.about__image-wrapper:hover .about__image {
    transform: scale(1.05);
}

.about__image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    opacity: 0;
    transition: var(--transition);
}

.about__image-wrapper:hover .about__image-overlay {
    opacity: 1;
}

.about__content {
    padding: var(--space-lg);
}

.about__title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.about__text {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.stat-card {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-light-gray);
    border-radius: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.stat-card__number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-card__label {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.about__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.about__feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-base);
    color: var(--color-dark);
}

.about__feature-icon {
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.about__feature-icon::before {
    content: '✓';
    color: var(--color-white);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

/* ============================================
   MATERIALS SECTION
   ============================================ */

.materials {
    padding: 100px 0;
    background: var(--color-light-gray);
}

.materials__scroll {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.material-card {
    background: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.material-card__image-wrapper {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.material-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.material-card:hover .material-card__image {
    transform: scale(1.1);
}

.material-card__content {
    padding: var(--space-lg);
}

.material-card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.material-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.material-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.material-card__features li {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    padding-left: 20px;
    position: relative;
}

.material-card__features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ============================================
   PROCESS SECTION
   ============================================ */

.process {
    padding: 100px 0;
    background: var(--color-white);
}

.process__timeline {
    display: grid;
    gap: var(--space-2xl);
    max-width: 900px;
    margin: 0 auto;
}

.process-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 80px;
    bottom: -48px;
    width: 2px;
    background: rgba(201, 169, 89, 0.2);
}

.process-step:last-child::before {
    display: none;
}

.process-step__number {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(201, 169, 89, 0.3);
    flex-shrink: 0;
}

.process-step__content {
    padding-top: var(--space-xs);
}

.process-step__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.process-step__description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.7;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */

.testimonials {
    padding: 100px 0;
    background: var(--color-light-gray);
}

.testimonials__slider {
    padding: var(--space-lg) 0;
}

.testimonials__track {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.testimonial-card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.testimonial-card__text {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-dark);
    margin-bottom: var(--space-lg);
    font-style: italic;
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.testimonial-card__avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-light-gray);
    overflow: hidden;
}

.testimonial-card__info {
    flex: 1;
}

.testimonial-card__name {
    font-weight: 600;
    font-size: var(--font-size-base);
    margin-bottom: 2px;
}

.testimonial-card__role {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta__content {
    max-width: 800px;
    margin: 0 auto;
}

.cta__title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta__description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xl);
    opacity: 0.95;
}

.cta__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

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

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

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

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
    padding: 100px 0;
    background: var(--color-light-gray);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-info {
    padding: var(--space-lg);
}

.contact-info__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.contact-info__description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.contact-info__items {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-info__item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    padding: var(--space-md);
    background: var(--color-white);
    border-radius: 16px;
    transition: var(--transition);
}

.contact-info__item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.contact-info__icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info__content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: 4px;
}

.contact-info__content p {
    font-size: var(--font-size-base);
    color: var(--color-gray);
}

.contact-form {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-form__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

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

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(201, 169, 89, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-button {
    width: 100%;
}

.contact-map {
    margin-top: var(--space-xl);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.contact-map iframe {
    width: 100%;
    height: 400px;
    border: none;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer__section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.footer__brand-description {
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.footer__section-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer__link:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
}

.footer__social-links {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: var(--transition);
}

.footer__social-link:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.footer__newsletter-form {
    display: flex;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.footer__newsletter-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    color: var(--color-white);
    font-size: var(--font-size-sm);
}

.footer__newsletter-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.footer__newsletter-button {
    padding: 12px 24px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.footer__newsletter-button:hover {
    background: var(--color-primary-dark);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer__bottom-text {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer__bottom-links {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin-top: var(--space-sm);
}

.footer__bottom-link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer__bottom-link:hover {
    color: var(--color-primary);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.scroll-progress {
    position: fixed;
    top: 70px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    z-index: 400;
    transition: width 0.1s linear;
}

.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 200;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    background: var(--color-white);
    padding: var(--space-md);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast--success {
    border-left: 4px solid #34C759;
}

.toast--error {
    border-left: 4px solid #FF3B30;
}

.toast__message {
    font-size: var(--font-size-sm);
    color: var(--color-dark);
}