/* ===========================
   BG Remover Pro – Full CSS
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-dark: #0d0e1a;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --purple: #818cf8;
    --violet: #c084fc;
    --indigo: #6366f1;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --success: #34d399;
    --error: #f87171;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* ---- Animated Background ---- */
.bg-gradient {
    position: fixed; inset: 0; z-index: 0;
    background: radial-gradient(ellipse at 20% 20%, rgba(99,102,241,0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(192,132,252,0.2) 0%, transparent 60%),
                #0d0e1a;
    pointer-events: none;
}

.orb {
    position: fixed; border-radius: 50%; filter: blur(80px);
    pointer-events: none; z-index: 0; opacity: 0.4;
    animation: floatOrb 10s ease-in-out infinite alternate;
}
.orb-1 { width: 400px; height: 400px; background: var(--indigo); top: -100px; left: -100px; }
.orb-2 { width: 350px; height: 350px; background: var(--violet); bottom: -80px; right: -80px; animation-delay: -4s; }
.orb-3 { width: 250px; height: 250px; background: #06b6d4; top: 50%; left: 50%; animation-delay: -8s; opacity: 0.15; }

@keyframes floatOrb {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(30px, 30px) scale(1.1); }
}

/* ---- Header ---- */
.top-header {
    position: relative; z-index: 10;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    background: rgba(13,14,26,0.6);
}

.logo {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 1.1rem; font-weight: 700; color: var(--text-primary);
}

.pro-badge {
    font-size: 0.65rem; font-weight: 700;
    background: linear-gradient(135deg, var(--purple), var(--violet));
    color: white; padding: 2px 7px; border-radius: 999px; letter-spacing: 0.05em;
    vertical-align: middle;
}

.header-tag {
    font-size: 0.8rem; color: var(--text-secondary);
    background: var(--glass); padding: 0.35rem 0.85rem;
    border-radius: 999px; border: 1px solid var(--glass-border);
}

/* ---- Main Content ---- */
.main-content {
    position: relative; z-index: 5;
    flex: 1; display: flex; flex-direction: column;
    align-items: center; padding: 3rem 1.5rem 2rem;
    gap: 2.5rem;
}

.hero-text { text-align: center; }

h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700; line-height: 1.2;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--purple) 0%, var(--violet) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    margin-top: 0.75rem; font-size: 1rem;
    color: var(--text-secondary); font-weight: 400;
}

/* ---- App Card (Glassmorphism) ---- */
.app-card {
    width: 100%; max-width: 560px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    backdrop-filter: blur(24px);
    padding: 2rem;
    box-shadow: 0 25px 60px rgba(0,0,0,0.4);
    transition: box-shadow var(--transition);
}

.app-card:hover { box-shadow: 0 30px 80px rgba(99,102,241,0.2); }

/* ---- Drop Area ---- */
.drop-area {
    position: relative;
    border: 2px dashed rgba(129,140,248,0.4);
    border-radius: var(--radius-sm);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: rgba(99,102,241,0.04);
    overflow: hidden;
}

.drop-area::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(129,140,248,0.08), transparent);
    opacity: 0; transition: opacity var(--transition);
    pointer-events: none;
}

.drop-area:hover, .drop-area.dragover {
    border-color: var(--purple);
    background: rgba(99,102,241,0.1);
    transform: translateY(-2px);
}

.drop-area:hover::before, .drop-area.dragover::before { opacity: 1; }

.drop-icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, rgba(129,140,248,0.15), rgba(192,132,252,0.15));
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1rem; color: var(--purple);
    transition: transform var(--transition);
}

.drop-area:hover .drop-icon { transform: translateY(-4px); }

.drop-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.drop-sub { font-size: 0.875rem; color: var(--text-secondary); margin-top: 0.25rem; }
.drop-link { color: var(--purple); text-decoration: underline; cursor: pointer; }
.drop-formats { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.75rem; opacity: 0.7; }

/* ---- Preview Section ---- */
.preview-section {
    margin-top: 1.25rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
    animation: fadeInUp 0.4s ease;
}

.preview-label {
    font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--text-secondary); margin-bottom: 0.5rem;
}

.preview-img-wrap {
    border-radius: var(--radius-sm); overflow: hidden;
    max-height: 200px; display: flex; align-items: center; justify-content: center;
}

.preview-img-wrap img { max-width: 100%; max-height: 200px; object-fit: contain; border-radius: 8px; }

.change-btn {
    background: transparent; border: 1px solid var(--glass-border);
    color: var(--text-secondary); font-size: 0.8rem;
    padding: 0.4rem 1rem; border-radius: 999px; cursor: pointer;
    margin-top: 0.75rem; transition: all var(--transition);
    font-family: inherit;
}

.change-btn:hover { border-color: var(--purple); color: var(--purple); }

/* ---- Checkerboard  (shows transparency) ---- */
.checkerboard {
    background-color: #f0f0f0;
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

/* ---- Controls ---- */
.controls {
    display: flex; flex-direction: column; gap: 1rem;
    margin-top: 1.5rem;
}

.select-wrapper label {
    display: block; font-size: 0.8rem; font-weight: 500;
    color: var(--text-secondary); margin-bottom: 0.4rem;
}

.select-box {
    position: relative;
}

.select-box select {
    width: 100%; padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 0.9rem; font-family: inherit;
    appearance: none; cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.select-box select:focus {
    outline: none; border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(129,140,248,0.2);
}

.select-box select option { background: #1e1f35; color: var(--text-primary); }

.select-icon {
    position: absolute; right: 1rem; top: 50%; transform: translateY(-50%);
    color: var(--text-secondary); pointer-events: none;
}

/* ---- Process Button ---- */
.process-btn {
    display: flex; align-items: center; justify-content: center; gap: 0.6rem;
    width: 100%; padding: 1rem;
    font-size: 1rem; font-weight: 600; font-family: inherit;
    color: white; border: none; cursor: pointer; border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--indigo) 0%, var(--violet) 100%);
    box-shadow: 0 4px 20px rgba(99,102,241,0.4);
    transition: all var(--transition); letter-spacing: 0.02em;
}

.process-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99,102,241,0.55);
}

.process-btn:active:not(:disabled) { transform: translateY(0); }

.process-btn:disabled {
    opacity: 0.6; cursor: not-allowed;
    box-shadow: none; transform: none;
}

/* ---- Progress Bar ---- */
.progress-section {
    margin-top: 1.5rem; animation: fadeInUp 0.3s ease;
}

.progress-track {
    width: 100%; height: 6px; border-radius: 999px;
    background: rgba(255,255,255,0.1); overflow: hidden;
}

.progress-fill {
    height: 100%; width: 0%; border-radius: 999px;
    background: linear-gradient(90deg, var(--indigo), var(--violet));
    transition: width 0.4s ease;
    position: relative; overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute; top: 0; left: -60%; width: 60%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    animation: shimmer 1.2s infinite;
}

@keyframes shimmer { to { left: 120%; } }

.status-text {
    text-align: center; font-size: 0.85rem; color: var(--text-secondary);
    margin-top: 0.75rem; font-weight: 500;
}

/* ---- Result Section ---- */
.result-section {
    width: 100%; max-width: 700px; text-align: center;
    animation: fadeInUp 0.5s ease;
}

.result-title {
    font-size: 1.2rem; font-weight: 600; margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.comparison-grid {
    display: flex; align-items: center; gap: 1rem;
    justify-content: center; flex-wrap: wrap;
}

.compare-card {
    flex: 1; min-width: 200px; max-width: 300px;
}

.compare-label {
    font-size: 0.75rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--text-secondary); margin-bottom: 0.5rem;
}

.compare-img-wrap {
    border-radius: var(--radius-sm); overflow: hidden;
    border: 1px solid var(--glass-border);
    max-height: 220px; display: flex; align-items: center; justify-content: center;
    padding: 4px;
}

.compare-img-wrap img { max-width: 100%; max-height: 210px; object-fit: contain; border-radius: 6px; }

.compare-divider { color: var(--purple); flex-shrink: 0; }

.download-btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    margin-top: 1.5rem; padding: 0.7rem 1.75rem;
    background: transparent; border: 1px solid var(--purple);
    color: var(--purple); border-radius: 999px; font-size: 0.9rem;
    font-family: inherit; font-weight: 500; cursor: pointer;
    transition: all var(--transition);
}

.download-btn:hover {
    background: var(--purple); color: white;
    box-shadow: 0 4px 20px rgba(129,140,248,0.35);
}

/* ---- Background Palette ---- */
.bg-palette {
    margin-top: 1.5rem;
    background: rgba(0,0,0,0.15);
    border-radius: var(--radius-sm);
    padding: 1rem;
    border: 1px solid var(--glass-border);
}

.palette-title {
    font-size: 0.85em; font-weight: 500; color: var(--text-secondary);
    margin-bottom: 0.75rem; text-align: left; padding-left: 0.5rem;
}

.color-options {
    display: flex; gap: 0.6rem; justify-content: flex-start;
    flex-wrap: wrap; padding-left: 0.5rem;
}

.color-btn {
    width: 32px; height: 32px; border-radius: 50%;
    border: 2px solid transparent; cursor: pointer;
    transition: transform var(--transition), border-color var(--transition);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.color-btn:hover { transform: scale(1.1); }
.color-btn.active { border-color: var(--text-primary); transform: scale(1.1); box-shadow: 0 0 10px rgba(255,255,255,0.4); }

.custom-color-wrapper {
    width: 32px; height: 32px; border-radius: 50%;
    overflow: hidden; cursor: pointer; border: 2px solid transparent;
    transition: transform var(--transition);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.custom-color-wrapper:hover { transform: scale(1.1); }
.custom-color-wrapper.active { border-color: var(--text-primary); transform: scale(1.1); box-shadow: 0 0 10px rgba(255,255,255,0.4); }

#customColorPicker {
    width: 150%; height: 150%; cursor: pointer; border: none;
    padding: 0; margin-left: -25%; margin-top: -25%;
}

/* ---- Toast ---- */
.toast {
    position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(20px);
    background: rgba(30, 31, 53, 0.95);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    padding: 0.75rem 1.5rem;
    border-radius: 999px; display: flex; align-items: center; gap: 0.6rem;
    font-size: 0.9rem; font-weight: 500; color: var(--text-primary);
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
    z-index: 1000; opacity: 0; pointer-events: none;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast.show {
    opacity: 1; transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* ---- Footer ---- */
.footer {
    position: relative; z-index: 5; text-align: center;
    padding: 1.25rem; font-size: 0.75rem; color: var(--text-secondary);
    border-top: 1px solid var(--glass-border); opacity: 0.7;
}

/* ---- Animations ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hidden { display: none !important; }

/* ---- Responsive ---- */
@media (max-width: 480px) {
    .top-header { padding: 1rem; }
    .header-tag { display: none; }
    .app-card { padding: 1.25rem; }
    .comparison-grid { flex-direction: column; }
    .compare-divider { transform: rotate(90deg); }
}