:root {
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --nav-bg: rgba(255, 255, 255, 0.86);
    --nav-border: #e2e8f0;
    --link-color: #2563eb;
    --card-bg: #ffffff;
    --btn-bg: #2563eb;
    --btn-text: #ffffff;
    --danger-color: #ef4444;
    --success-color: #22c55e;
    --muted-text: #64748b;
    --input-border: #cbd5e1;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

[data-theme='dark'] {
    --bg-color: #0f172a;
    --text-color: #f1f5f9;
    --nav-bg: rgba(15, 23, 42, 0.86);
    --nav-border: #1e293b;
    --link-color: #3b82f6;
    --card-bg: #1e293b;
    --btn-bg: #3b82f6;
    --btn-text: #ffffff;
    --danger-color: #f87171;
    --success-color: #4ade80;
    --muted-text: #94a3b8;
    --input-border: #334155;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--nav-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    text-decoration: none;
}

.nav-links a.active {
    color: var(--link-color);
}

/* Buttons */
.primary-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    text-align: center;
}

.secondary-btn {
    background: transparent;
    border: 1px solid var(--nav-border);
    color: var(--text-color);
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

.primary-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.secondary-btn:hover {
    background: rgba(0,0,0,0.05);
    transform: translateY(-2px);
}

/* Glass Panel */
.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

/* Printer Cards */
.printer-card {
    background: var(--card-bg);
    border: 1px solid var(--nav-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.printer-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
    border-color: var(--link-color);
}

.card-images {
    width: 100%;
    height: 200px;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--nav-border);
}

.card-images img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-description {
    font-size: 0.9rem;
    color: var(--muted-text);
    margin-bottom: 1.5rem;
}

.animate-in {
    animation: fadeInUp 0.5s ease backwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Grids */
.printer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: top;
}

.printer-grid.hidden {
    display: none;
    opacity: 0;
    transform: translateY(-20px) scaleY(0.95);
}

.printer-grid:not(.hidden) {
    animation: slideDown 0.5s ease forwards;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px) scaleY(0.95); }
    to { opacity: 1; transform: translateY(0) scaleY(1); }
}

/* Hero Section */
.hero-section {
    padding: 6rem 1rem;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-color) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--muted-text);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
    .hero-section {
        padding: 3rem 1rem;
    }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .glass-panel {
        padding: 1.5rem;
    }
}

/* Utilities */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.w-full { width: 100%; }
.muted-text { color: var(--muted-text); }

.mini-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid var(--nav-border);
    background: var(--card-bg);
    color: var(--text-color);
}

.danger-btn { background: var(--danger-color); color: white; border: none; }
.success-btn { background: var(--success-color); color: white; border: none; }

/* Status & Level Badges */
.status-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}
.status-aktif { background: rgba(34, 197, 94, 0.1); color: #22c55e; }
.status-pasif { background: rgba(239, 68, 68, 0.1); color: #ef4444; }

.level-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}
.level-başlangıç { background: rgba(34, 197, 94, 0.15); color: #16a34a; }
.level-orta { background: rgba(37, 99, 235, 0.15); color: #2563eb; }
.level-profesyonel { background: rgba(245, 158, 11, 0.15); color: #d97706; }

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 1rem 2rem;
    background: var(--btn-bg);
    color: white;
    border-radius: 8px;
    z-index: 10000;
    display: none;
}
.toast.show { display: block; animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* AI Assistant */
#ai-assistant-wrapper {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 10000;
}

#ai-toggle-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--link-color);
    color: white;
    border: none;
    font-size: 30px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: transform 0.3s ease;
}

#ai-toggle-btn:hover { transform: scale(1.1); }

#ai-chat-window {
    position: absolute;
    bottom: 75px;
    right: 0;
    width: 300px;
    height: 400px;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.ai-header {
    background: var(--link-color);
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
}

.ai-header button { background: none; border: none; color: white; cursor: pointer; }

#ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.ai-msg {
    margin-bottom: 10px;
    padding: 8px 12px;
    border-radius: 12px;
    max-width: 85%;
    font-size: 0.9rem;
}

.ai-msg.bot { background: var(--bg-color); border: 1px solid var(--nav-border); color: var(--text-color); }
.ai-msg.user { background: var(--link-color); color: white; margin-left: auto; }

.ai-options {
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    border-top: 1px solid var(--nav-border);
}

.ai-options button {
    font-size: 0.75rem;
    padding: 5px 8px;
    border-radius: 4px;
    border: 1px solid var(--link-color);
    background: none;
    color: var(--link-color);
    cursor: pointer;
}