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

/* Font Loading Optimization */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 300 900;
    font-display: swap;
    src: local('Inter'), url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
}

:root {
    --dark-bg: #1d2333;
    --medium-bg: #292f3e;
    --text-color: #ffffff;
    --accent-gold: #FFD700;
    --accent-green: #00C853;
    --border-color: #3a4058;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    padding-bottom: 70px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--medium-bg);
    padding: 15px 0;
    box-shadow: 0 4px 20px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--accent-gold);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-color);
    justify-content: center;
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

/* Hero Section */
.hero {
    padding: 40px 0 30px;
    text-align: center;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--medium-bg) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 38px;
    font-weight: 900;
    margin-bottom: 14px;
    color: var(--text-color);
    text-shadow: 0 2px 12px rgba(255, 255, 255, 0.2);
}

.subtitle {
    font-size: 16px;
    color: #b8bcc8;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Video Section */
.video-section {
    padding: 35px 0;
    background-color: var(--dark-bg);
}

.video-section h2 {
    text-align: center;
    font-size: 30px;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.1);
}

.section-description {
    text-align: center;
    color: #b8bcc8;
    margin-bottom: 25px;
    font-size: 14px;
}

.video-wrapper {
    max-width: 400px;
    margin: 0 auto;
    background-color: var(--medium-bg);
    padding: 12px;
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--shadow);
    border: 1px solid var(--border-color);
    position: relative;
}

.video-wrapper video {
    width: 100%;
    border-radius: 12px;
    display: block;
    background-color: #000;
    position: relative;
    z-index: 1;
}

.video-wrapper video::-webkit-media-controls {
    display: flex !important;
}

.video-wrapper video::-webkit-media-controls-panel {
    display: flex !important;
}

.video-overlay {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 10;
    pointer-events: auto;
}

.video-overlay[style*="display: none"] {
    pointer-events: none;
    z-index: -1;
}

.video-overlay:hover {
    background: rgba(0, 0, 0, 0.8);
}

.play-button {
    font-size: 28px;
    font-weight: 900;
    color: var(--accent-gold);
    text-transform: uppercase;
    padding: 20px 30px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.1));
    border: 3px solid var(--accent-gold);
    border-radius: 12px;
    text-shadow: 0 2px 8px rgba(255, 215, 0, 0.5);
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
    transition: all 0.3s ease;
}

.play-button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 30px rgba(255, 215, 0, 0.5);
}

/* Content Section */
.content-section {
    padding: 25px 0 40px;
    background-color: var(--dark-bg);
}

/* Guide Cards */
.guide-card {
    background-color: var(--medium-bg);
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 6px 24px var(--shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    contain: layout style paint;
    content-visibility: auto;
}

.guide-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, #2a3142 0%, #1f2433 100%);
    padding: 16px 25px;
    border-bottom: 2px solid var(--accent-gold);
    display: flex;
    align-items: center;
    gap: 15px;
}

.step-number {
    background: linear-gradient(135deg, var(--accent-gold), #FFC400);
    color: var(--dark-bg);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 900;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.5);
}

.card-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-color);
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.15);
}

.card-content {
    padding: 25px;
}

/* Content with Screenshot Layout */
.content-with-screenshot {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 25px;
    align-items: start;
}

.step-content {
    min-width: 0;
}

.intro-text {
    font-size: 15px;
    color: #d4d7e0;
    margin-bottom: 15px;
    line-height: 1.6;
}

/* Step List - Kompakt Yapı */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.step-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 10px 12px;
    background-color: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border-left: 2px solid var(--accent-gold);
    transition: all 0.3s ease;
}

.step-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    transform: translateX(3px);
}

.step-bullet {
    font-size: 20px;
    flex-shrink: 0;
    line-height: 1;
}

.step-item p {
    color: #c4c8d4;
    line-height: 1.5;
    font-size: 14px;
    margin: 0;
}

.step-item strong {
    color: var(--accent-gold);
    font-weight: 600;
}

/* Screenshot Area */
.screenshot-area {
    position: sticky;
    top: 80px;
}

.screenshot-area.center {
    position: relative;
    top: auto;
    margin: 20px auto;
    max-width: 500px;
}

.screenshot-placeholder {
    background: transparent;
    border: none;
    border-radius: 12px;
    padding: 0;
    text-align: center;
    transition: all 0.3s ease;
    aspect-ratio: 9/16;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.screenshot-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}


/* Uploaded Screenshot Display */
.screenshot-area img {
    width: 100%;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    will-change: transform;
    content-visibility: auto;
}

.screenshot-area img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 32px rgba(255, 215, 0, 0.3);
}

/* Info Boxes */
.info-box,
.warning-box,
.success-box {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 3px solid;
    font-size: 13px;
}

.info-box {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.12), rgba(33, 150, 243, 0.05));
    border-left-color: #2196F3;
}

.warning-box {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.12), rgba(255, 152, 0, 0.05));
    border-left-color: #FF9800;
}

.success-box {
    background: linear-gradient(135deg, rgba(0, 200, 83, 0.12), rgba(0, 200, 83, 0.05));
    border-left-color: var(--accent-green);
}

.info-box p,
.warning-box p,
.success-box p {
    margin: 0;
    color: #d4d7e0;
    line-height: 1.6;
}

.info-box strong,
.warning-box strong,
.success-box strong {
    color: var(--text-color);
}

.success-box h4 {
    margin-bottom: 8px;
    font-size: 15px;
    color: var(--text-color);
}

.bank-note {
    margin-top: 8px !important;
    color: var(--accent-gold) !important;
    font-size: 14px !important;
}

/* Highlight Card */
.highlight-card .card-header {
    border-bottom-color: var(--accent-green);
}

.highlight-card .step-number {
    background: linear-gradient(135deg, var(--accent-green), #00E676);
}

/* Bonus Card */
.bonus-card {
    background: linear-gradient(135deg, var(--medium-bg), #2a3040);
    border: 2px solid var(--accent-gold);
    box-shadow: 0 8px 40px rgba(255, 215, 0, 0.3);
}

.bonus-card .card-header {
    background: linear-gradient(135deg, #3a3f52, #2d3242);
    border-bottom: 3px solid var(--accent-gold);
}

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

.bonus-icon {
    font-size: 60px;
    margin-bottom: 12px;
    animation: bounce 2s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.bonus-content h2 {
    font-size: 32px;
    margin-bottom: 10px;
    color: var(--accent-gold);
    font-weight: 900;
    text-shadow: 0 3px 15px rgba(255, 215, 0, 0.5);
}

.bonus-text {
    font-size: 16px;
    color: #d4d7e0;
    margin-bottom: 25px;
}

.bonus-example {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 20px;
    max-width: 450px;
    margin: 0 auto 25px;
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.bonus-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 15px;
}

.bonus-row:last-child {
    border-bottom: none;
}

.bonus-row span {
    color: #b8bcc8;
}

.bonus-row strong {
    color: var(--text-color);
    font-size: 16px;
}

.bonus-amount strong {
    color: var(--accent-green);
}

.total-amount {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(255, 215, 0, 0.05));
    margin: 10px -10px -10px;
    padding: 14px 10px 10px;
    border-radius: 0 0 12px 12px;
    font-size: 16px;
}

.total-amount span {
    color: var(--text-color);
    font-weight: 600;
}

.highlight-gold {
    color: var(--accent-gold) !important;
    font-size: 22px !important;
    font-weight: 900 !important;
    text-shadow: 0 2px 10px rgba(255, 215, 0, 0.4);
}

/* Video Bar (Fixed Bottom) */
.video-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--accent-gold), #FFC400);
    padding: 15px 20px;
    z-index: 999;
    cursor: pointer;
    box-shadow: 0 -4px 20px rgba(255, 215, 0, 0.5);
    transition: all 0.3s ease;
}

.video-bar:hover {
    padding: 18px 20px;
    box-shadow: 0 -6px 30px rgba(255, 215, 0, 0.7);
}

.video-bar-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.video-bar-icon {
    font-size: 24px;
}

.video-bar-text {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark-bg);
    text-transform: uppercase;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    padding: 50px 20px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s ease;
}

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

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.8);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 48px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.lightbox-close:hover {
    color: var(--accent-gold);
}

.lightbox-caption {
    margin: auto;
    display: block;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 20px 0;
    font-size: 16px;
}

/* Footer */
footer {
    background-color: var(--medium-bg);
    padding: 25px 0;
    border-top: 2px solid var(--border-color);
    text-align: center;
    margin-bottom: 0;
}

footer p {
    color: #b8bcc8;
    margin-bottom: 6px;
    font-size: 14px;
}

.disclaimer {
    font-size: 13px;
    color: #8b90a0;
    max-width: 800px;
    margin: 6px auto 0;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding-bottom: 60px;
    }

    .logo {
        font-size: 18px;
        justify-content: center;
    }

    .logo-img {
        height: 35px;
    }

    .hero {
        padding: 30px 0 25px;
    }

    .hero h1 {
        font-size: 26px;
    }

    .subtitle {
        font-size: 14px;
    }

    .video-section h2 {
        font-size: 24px;
    }

    .video-section {
        padding: 25px 0;
    }

    .content-section {
        padding: 20px 0 30px;
    }

    .card-header {
        flex-direction: column;
        text-align: center;
        padding: 14px 18px;
        gap: 10px;
    }

    .card-header h3 {
        font-size: 18px;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .card-content {
        padding: 18px;
    }

    /* Mobile: Screenshot üstte, content altta */
    .content-with-screenshot {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .screenshot-area {
        position: relative;
        top: auto;
    }

    .step-list {
        text-align: left;
    }

    .step-item {
        text-align: left;
    }

    .video-wrapper {
        max-width: 100%;
        padding: 10px;
    }

    .video-wrapper video {
        width: 100%;
        height: auto;
    }

    .video-wrapper video::-webkit-media-controls {
        display: flex !important;
        opacity: 1 !important;
    }

    .video-wrapper video::-webkit-media-controls-panel {
        display: flex !important;
        opacity: 1 !important;
    }

    .video-wrapper video::-webkit-media-controls-play-button {
        display: block !important;
    }

    .video-wrapper video::-webkit-media-controls-timeline {
        display: flex !important;
    }

    .play-button {
        font-size: 20px;
        padding: 15px 20px;
    }

    .bonus-content h2 {
        font-size: 24px;
    }

    .bonus-text {
        font-size: 14px;
    }

    .bonus-example {
        padding: 16px;
    }

    .video-bar {
        padding: 12px 15px;
    }

    .video-bar-text {
        font-size: 15px;
    }

    .video-bar-icon {
        font-size: 20px;
    }

    .lightbox-close {
        top: 15px;
        right: 25px;
        font-size: 40px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 22px;
    }

    .subtitle {
        font-size: 13px;
    }

    .card-header h3 {
        font-size: 16px;
    }

    .step-bullet {
        font-size: 18px;
    }

    .step-item p {
        font-size: 13px;
    }

    .guide-card {
        margin-bottom: 16px;
    }

    .bonus-icon {
        font-size: 50px;
    }

    .bonus-content h2 {
        font-size: 20px;
    }

    .video-bar-text {
        font-size: 14px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background-color: var(--accent-gold);
    color: var(--dark-bg);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--medium-bg);
    border-radius: 5px;
    border: 2px solid var(--dark-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gold);
}