/* 
   QR CODE GENERATOR - EXPERT WEB TOOLS
   Theme: 2025 Glassmorphism
*/

/* --- Fonts --- */
@font-face { font-family: 'Inter'; src: url('/fonts/inter-v20-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Orbitron'; src: url('/fonts/orbitron-v35-latin-700.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Roboto Mono'; src: url('/fonts/roboto-mono-v31-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }

:root {
    --bg-dark: #0a0a0f;
    --primary-accent: #3b82f6;
    --secondary-accent: #8b5cf6;
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    --card-bg: rgba(25, 25, 35, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(255, 255, 255, 0.05);
    
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-code: 'Roboto Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.background-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.08) 0%, rgba(10, 10, 15, 0) 50%);
    z-index: -1;
    pointer-events: none;
}

/* --- Header --- */
.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}
.back-btn {
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s;
}
.back-btn:hover { color: var(--primary-accent); }
.logo { font-family: var(--font-heading); font-size: 1.2rem; }
.logo span { color: var(--primary-accent); }

/* --- Main Layout --- */
.main-content {
    flex-grow: 1;
    padding: 2rem 5%;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.tool-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    align-items: start;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.card h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Options Panel */
.options-panel { display: flex; flex-direction: column; }

/* Tabs */
.qr-type-tabs {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.tab-btn:hover { background: rgba(255,255,255,0.05); color: #fff; }
.tab-btn.active { background: var(--primary-accent); color: #fff; border-color: var(--primary-accent); }

/* Inputs */
.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.qr-input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 12px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    margin-bottom: 1rem;
    transition: border-color 0.2s;
}
.qr-input:focus { border-color: var(--primary-accent); }
textarea.qr-input { resize: vertical; min-height: 100px; }

/* Customization */
.color-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

input[type="color"] {
    width: 100%;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: none;
}

.file-upload-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-label {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px dashed var(--card-border);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s;
}
.file-label:hover { border-color: var(--primary-accent); color: var(--primary-accent); }

.remove-btn {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
    width: 45px;
    height: 45px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Preview Panel */
.preview-panel {
    position: sticky;
    top: 2rem;
}

.preview-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qr-canvas-wrapper {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    max-width: 100%;
    overflow: hidden;
}

.download-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    width: 100%;
}

.download-btn {
    padding: 12px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.download-btn:hover { transform: translateY(-2px); }

.download-btn.primary { background: var(--primary-accent); color: #fff; }
.download-btn.secondary { background: transparent; border: 1px solid var(--card-border); color: var(--text-main); }
.download-btn.secondary:hover { background: rgba(255,255,255,0.05); }

.info-card-mini { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.info-card-mini i { color: #10b981; margin-right: 5px; }

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }

footer { text-align: center; padding: 3rem 0; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--card-border); margin-top: 3rem; }
footer a { color: #fff; text-decoration: none; }

/* Responsive */
@media (max-width: 900px) {
    .tool-layout { grid-template-columns: 1fr; }
    .preview-panel { position: static; order: -1; } /* Preview on top for mobile */
    .download-actions { grid-template-columns: 1fr 1fr; }
}