/* ============================================================
   Dental Makeover Virtual Mirror — Styles
   ============================================================ */

:root {
    --dm-primary: #6366F1;
    --dm-primary-glow: rgba(99,102,241,.45);
    --dm-accent: #60A5FA;
    --dm-bg: #0F172A;
    --dm-surface: #1E293B;
    --dm-surface2: #334155;
    --dm-text: #F1F5F9;
    --dm-text-dim: #94A3B8;
    --dm-radius: 14px;
    --dm-radius-sm: 8px;
    --dm-transition: .25s cubic-bezier(.4,0,.2,1);
}

/* Reset inside our app */
.dm-app *, .dm-app *::before, .dm-app *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.dm-app {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dm-text);
    background: var(--dm-bg);
    border-radius: var(--dm-radius);
    overflow: hidden;
    position: relative;
    max-width: 960px;
    margin: 2rem auto;
    box-shadow: 0 25px 60px rgba(0,0,0,.5);
}

/* ---- Landing Screen ---- */
.dm-landing {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 520px;
    padding: 3rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #0F172A 100%);
    position: relative;
    overflow: hidden;
}

.dm-landing::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 40%, rgba(99,102,241,.15) 0%, transparent 60%);
    pointer-events: none;
}

.dm-landing-content {
    position: relative;
    z-index: 1;
    max-width: 480px;
}

.dm-logo-icon svg {
    width: 72px;
    height: 72px;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px rgba(99,102,241,.4));
    animation: dm-float 3s ease-in-out infinite;
}

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

.dm-landing h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -.02em;
    margin-bottom: .75rem;
    background: linear-gradient(135deg, #F1F5F9, #60A5FA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dm-subtitle {
    color: var(--dm-text-dim);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.dm-note {
    color: var(--dm-text-dim);
    font-size: .8rem;
    margin-top: 1rem;
    opacity: .7;
}

/* ---- Buttons ---- */
.dm-btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .65rem 1.25rem;
    border: none;
    border-radius: var(--dm-radius-sm);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--dm-transition);
    font-family: inherit;
    white-space: nowrap;
}

.dm-btn-primary {
    background: var(--dm-primary);
    color: #fff;
}

.dm-btn-primary:hover {
    background: #818CF8;
    transform: translateY(-1px);
}

.dm-btn-glow {
    box-shadow: 0 0 30px var(--dm-primary-glow), 0 4px 15px rgba(0,0,0,.3);
    padding: .85rem 2rem;
    font-size: 1.05rem;
    border-radius: 50px;
}

.dm-btn-glow:hover {
    box-shadow: 0 0 50px var(--dm-primary-glow), 0 6px 20px rgba(0,0,0,.4);
}

.dm-btn-secondary {
    background: var(--dm-surface2);
    color: var(--dm-text);
}

.dm-btn-secondary:hover {
    background: #475569;
}

.dm-btn-icon-only {
    background: var(--dm-surface2);
    color: var(--dm-text);
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border-radius: 50%;
}

.dm-btn-icon-only:hover {
    background: #475569;
}

.dm-btn-icon {
    font-size: 1.1rem;
}

/* ---- Mirror View ---- */
.dm-mirror {
    display: flex;
    flex-direction: column;
    min-height: 600px;
}

/* Top Bar */
.dm-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .75rem 1rem;
    background: var(--dm-surface);
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.dm-topbar-left, .dm-topbar-right {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.dm-topbar h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-left: .25rem;
}

/* Canvas Area */
.dm-canvas-wrap {
    position: relative;
    flex: 1;
    background: #000;
    min-height: 380px;
    overflow: hidden;
}

#dm-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
    opacity: 0;
}

#dm-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Loading */
.dm-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(15,23,42,.9);
    z-index: 10;
}

.dm-loading p {
    color: var(--dm-text-dim);
    margin-top: 1rem;
    font-size: .9rem;
}

.dm-spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--dm-surface2);
    border-top-color: var(--dm-primary);
    border-radius: 50%;
    animation: dm-spin .8s linear infinite;
}

@keyframes dm-spin {
    to { transform: rotate(360deg); }
}

/* No Face Warning */
.dm-no-face {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(239,68,68,.85);
    color: #fff;
    padding: .5rem 1.25rem;
    border-radius: 50px;
    font-size: .85rem;
    z-index: 5;
    backdrop-filter: blur(8px);
    animation: dm-fade-in .3s ease;
}

@keyframes dm-fade-in {
    from { opacity: 0; transform: translateX(-50%) translateY(8px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Compare Overlay */
.dm-compare-overlay {
    position: absolute;
    inset: 0;
    z-index: 8;
    pointer-events: none;
}

.dm-compare-label {
    position: absolute;
    top: 1rem;
    padding: .35rem .75rem;
    border-radius: 50px;
    font-size: .75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.dm-compare-before {
    left: 1rem;
    background: rgba(239,68,68,.8);
}

.dm-compare-after {
    right: 1rem;
    background: rgba(34,197,94,.8);
}

.dm-compare-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,.5);
    pointer-events: auto;
    cursor: ew-resize;
}

.dm-compare-line::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

/* ---- Procedure Panel ---- */
.dm-panel {
    background: var(--dm-surface);
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 1rem;
}

.dm-procedures {
    display: flex;
    gap: .5rem;
    overflow-x: auto;
    padding-bottom: .5rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.dm-procedures::-webkit-scrollbar {
    display: none;
}

.dm-proc-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .3rem;
    padding: .75rem 1rem;
    min-width: 85px;
    border: 2px solid transparent;
    border-radius: var(--dm-radius-sm);
    background: var(--dm-surface2);
    color: var(--dm-text-dim);
    font-size: .78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--dm-transition);
    font-family: inherit;
    flex-shrink: 0;
}

.dm-proc-btn .dm-proc-icon {
    font-size: 1.4rem;
}

.dm-proc-btn:hover {
    background: #3B4252;
    color: var(--dm-text);
}

.dm-proc-btn.active {
    border-color: var(--dm-primary);
    background: rgba(99,102,241,.15);
    color: #fff;
}

/* ---- Options ---- */
.dm-options {
    margin-top: .75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: .75rem;
    border-top: 1px solid rgba(255,255,255,.06);
}

.dm-option-group {
    flex: 1;
    min-width: 200px;
}

.dm-option-group label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--dm-text-dim);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: .5rem;
}

/* Shades */
.dm-shades {
    display: flex;
    gap: .5rem;
}

.dm-shade {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all var(--dm-transition);
    box-shadow: inset 0 -2px 4px rgba(0,0,0,.15);
}

.dm-shade:hover {
    transform: scale(1.15);
}

.dm-shade.active {
    border-color: var(--dm-primary);
    box-shadow: 0 0 0 2px var(--dm-primary-glow), inset 0 -2px 4px rgba(0,0,0,.15);
}

/* Slider */
.dm-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--dm-surface2);
    outline: none;
    cursor: pointer;
}

.dm-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--dm-primary);
    box-shadow: 0 0 8px var(--dm-primary-glow);
    cursor: pointer;
    transition: transform .15s;
}

.dm-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.dm-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--dm-primary);
    border: none;
    box-shadow: 0 0 8px var(--dm-primary-glow);
    cursor: pointer;
}

/* Tooth Options */
.dm-tooth-options {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
}

.dm-tooth-opt {
    padding: .4rem .75rem;
    border: 1px solid var(--dm-surface2);
    border-radius: 50px;
    background: transparent;
    color: var(--dm-text-dim);
    font-size: .78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--dm-transition);
    font-family: inherit;
}

.dm-tooth-opt:hover {
    border-color: var(--dm-primary);
    color: var(--dm-text);
}

.dm-tooth-opt.active {
    background: var(--dm-primary);
    border-color: var(--dm-primary);
    color: #fff;
}

/* ---- Snapshot Modal ---- */
.dm-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,.75);
    z-index: 9999;
    backdrop-filter: blur(6px);
    animation: dm-fade-in .25s ease;
}

.dm-modal-content {
    background: var(--dm-surface);
    border-radius: var(--dm-radius);
    padding: 2rem;
    max-width: 540px;
    width: 90%;
    text-align: center;
    position: relative;
}

.dm-modal-close {
    position: absolute;
    top: .75rem;
    right: .75rem;
    background: none;
    border: none;
    color: var(--dm-text-dim);
    font-size: 1.5rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--dm-transition);
}

.dm-modal-close:hover {
    background: var(--dm-surface2);
    color: var(--dm-text);
}

.dm-modal-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

#dm-snap-canvas {
    width: 100%;
    border-radius: var(--dm-radius-sm);
    margin-bottom: 1rem;
}

.dm-snap-actions {
    display: flex;
    gap: .75rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.dm-disclaimer {
    color: var(--dm-text-dim);
    font-size: .72rem;
    font-style: italic;
    opacity: .7;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
    .dm-app {
        margin: 0;
        border-radius: 0;
        max-width: 100%;
    }

    .dm-landing {
        min-height: 420px;
        padding: 2rem 1.5rem;
    }

    .dm-landing h1 {
        font-size: 1.5rem;
    }

    .dm-topbar {
        padding: .5rem .75rem;
    }

    .dm-topbar h2 {
        font-size: .95rem;
    }

    .dm-topbar-right .dm-btn-secondary span:not(.dm-btn-icon) {
        display: none;
    }

    .dm-proc-btn {
        min-width: 72px;
        padding: .6rem .75rem;
        font-size: .72rem;
    }

    .dm-options {
        flex-direction: column;
    }

    .dm-option-group {
        min-width: unset;
    }
}