/* ========================================
   WarpDrop - Translucent Theme System
   ======================================== */

:root {
    /* Base colors - will be overridden by theme */
    --primary: 210, 100%, 80%;
    --primary-dark: 210, 100%, 60%;

    /* Light mode defaults */
    --bg-start: hsl(var(--primary), 0.1);
    --bg-end: hsl(calc(var(--primary) + 40), 100%, 90%);
    --surface: rgba(255, 255, 255, 0.7);
    --surface-hover: rgba(255, 255, 255, 0.85);
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --border: rgba(255, 255, 255, 0.5);
    --shadow: rgba(0, 0, 0, 0.1);
    --glass-blur: 20px;
}

[data-theme="dark"] {
    --bg-start: hsl(var(--primary), 0.05);
    --bg-end: hsl(220, 20%, 10%);
    --surface: rgba(30, 30, 50, 0.7);
    --surface-hover: rgba(40, 40, 65, 0.85);
    --text: #f0f0f5;
    --text-secondary: #cbd5e1;
    --border: rgba(255, 255, 255, 0.15);
    --shadow: rgba(0, 0, 0, 0.3);
}

/* Pastel Color Themes - 24 colors */
[data-color="rose"] {
    --primary: 350, 100%, 80%;
    --primary-dark: 350, 80%, 65%;
}

[data-color="pink"] {
    --primary: 330, 100%, 82%;
    --primary-dark: 330, 80%, 67%;
}

[data-color="fuchsia"] {
    --primary: 300, 90%, 80%;
    --primary-dark: 300, 70%, 65%;
}

[data-color="purple"] {
    --primary: 280, 85%, 78%;
    --primary-dark: 280, 65%, 63%;
}

[data-color="violet"] {
    --primary: 260, 90%, 80%;
    --primary-dark: 260, 70%, 65%;
}

[data-color="indigo"] {
    --primary: 240, 80%, 78%;
    --primary-dark: 240, 60%, 63%;
}

[data-color="blue"] {
    --primary: 210, 100%, 80%;
    --primary-dark: 210, 80%, 65%;
}

[data-color="sky"] {
    --primary: 195, 100%, 78%;
    --primary-dark: 195, 80%, 60%;
}

[data-color="cyan"] {
    --primary: 180, 85%, 75%;
    --primary-dark: 180, 65%, 55%;
}

[data-color="teal"] {
    --primary: 165, 80%, 72%;
    --primary-dark: 165, 60%, 52%;
}

[data-color="emerald"] {
    --primary: 150, 80%, 75%;
    --primary-dark: 150, 60%, 55%;
}

[data-color="green"] {
    --primary: 130, 70%, 75%;
    --primary-dark: 130, 50%, 55%;
}

[data-color="lime"] {
    --primary: 90, 80%, 78%;
    --primary-dark: 90, 60%, 55%;
}

[data-color="yellow"] {
    --primary: 50, 100%, 80%;
    --primary-dark: 50, 80%, 60%;
}

[data-color="amber"] {
    --primary: 40, 100%, 78%;
    --primary-dark: 40, 80%, 58%;
}

[data-color="orange"] {
    --primary: 25, 100%, 78%;
    --primary-dark: 25, 80%, 60%;
}

[data-color="coral"] {
    --primary: 15, 100%, 80%;
    --primary-dark: 15, 80%, 65%;
}

[data-color="red"] {
    --primary: 5, 90%, 78%;
    --primary-dark: 5, 70%, 60%;
}

[data-color="stone"] {
    --primary: 30, 20%, 75%;
    --primary-dark: 30, 15%, 55%;
}

[data-color="slate"] {
    --primary: 210, 20%, 75%;
    --primary-dark: 210, 15%, 55%;
}

[data-color="zinc"] {
    --primary: 240, 10%, 78%;
    --primary-dark: 240, 8%, 58%;
}

[data-color="mint"] {
    --primary: 160, 60%, 80%;
    --primary-dark: 160, 45%, 60%;
}

[data-color="lavender"] {
    --primary: 270, 60%, 82%;
    --primary-dark: 270, 45%, 67%;
}

[data-color="peach"] {
    --primary: 20, 100%, 85%;
    --primary-dark: 20, 80%, 70%;
}

/* ========================================
   Global Styles
   ======================================== */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-end) 100%);
    background-attachment: fixed;
    color: var(--text);
    transition: background 0.5s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Animated background blobs */
body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

body::before {
    width: 500px;
    height: 500px;
    background: hsl(var(--primary));
    top: -200px;
    left: -100px;
}

body::after {
    width: 400px;
    height: 400px;
    background: hsl(calc(var(--primary) + 60), 80%, 75%);
    bottom: -150px;
    right: -100px;
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(20px, 30px) scale(1.02);
    }
}

/* ========================================
   Glass Card Component
   ======================================== */

.glass {
    background: var(--surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: 0 8px 32px var(--shadow);
    transition: all 0.3s ease;
}

.glass:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px var(--shadow);
}

/* ========================================
   Layout
   ======================================== */

.app-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 20px 0 10px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-container {
    margin-bottom: 0px;
    display: flex;
    justify-content: center;
    width: 100%;
}

.main-logo {
    max-width: 280px;
    height: auto;
}

.logo-text-warp {
    fill: #1e293b;
}

[data-theme="dark"] .logo-text-warp {
    fill: #f1f5f9;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    text-align: center;
    margin-top: -6px;
    margin-bottom: 24px;
    /* Space between slogan and the box below */
}

[data-theme="dark"] .tagline {
    color: #cbd5e1;
    /* Brighter Slate for better contrast in dark mode */
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ========================================
   Settings Bar
   ======================================== */

.settings-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 16px;
    margin-bottom: 10px;
    position: relative;
    z-index: 50;
}

/* Disable hover transform on settings-bar to prevent color palette shifting */
.settings-bar.glass:hover {
    transform: none;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* Color Picker */
.color-picker-btn {
    position: relative;
    padding: 8px 14px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    background: var(--surface);
}

.color-preview {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, hsl(var(--primary-dark)), hsl(var(--primary)));
    border: 2px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.color-palette {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    padding: 16px;
    border-radius: 20px;
    display: none;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    z-index: 1000;
    min-width: 280px;
    /* Translucent glassmorphism effect */
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .color-palette {
    background: rgba(30, 30, 50, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.color-palette::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 24px;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid rgba(255, 255, 255, 0.85);
}

[data-theme="dark"] .color-palette::before {
    border-bottom-color: rgba(30, 30, 50, 0.9);
}

.color-palette.show {
    display: grid;
    animation: fadeIn 0.2s ease;
}

.color-swatch {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid transparent;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.color-swatch:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.color-swatch.active {
    border-color: var(--text);
    transform: scale(1.15);
    box-shadow: 0 0 0 2px var(--surface), 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Room Section
   ======================================== */

.room-section {
    padding: 32px;
}

/* Disable hover transform when color palette is showing */
.room-section.glass:hover {
    transform: none;
}

.room-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.btn {
    padding: 16px 24px;
    border: none;
    border-radius: 16px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, hsl(var(--primary-dark)) 0%, hsl(var(--primary)) 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px hsla(var(--primary-dark), 0.4);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 2px solid hsl(var(--primary));
}

.btn-secondary:hover {
    background: hsl(var(--primary), 0.2);
}

.input-group {
    display: flex;
    gap: 12px;
}

.input-group input {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
    color: var(--text);
    font-size: 1.1rem;
    text-align: center;
    letter-spacing: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.input-group input::placeholder {
    letter-spacing: 1px;
    text-transform: none;
    font-weight: 400;
}

.input-group input:focus {
    outline: none;
    border-color: hsl(var(--primary));
}

/* ========================================
   Connected State
   ======================================== */

.room-connected {
    display: none;
}

.room-connected.active {
    display: block;
}

.room-info {
    padding: 32px;
    text-align: center;
}

.room-code-display {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: 8px;
    color: hsl(var(--primary-dark));
    margin: 16px 0;
}

.connection-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fbbf24;
    animation: pulse 2s infinite;
}

.status-dot.connected {
    background: #22c55e;
    animation: none;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.share-link {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.share-link input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text);
    font-size: 0.85rem;
}

.share-link button {
    padding: 12px 20px;
    border-radius: 12px;
    background: hsl(var(--primary));
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 600;
}

/* ========================================
   File Transfer Section
   ======================================== */

.transfer-section {
    padding: 32px;
    display: none;
}

.transfer-section.active {
    display: block;
}

.drop-zone {
    border: 3px dashed var(--border);
    border-radius: 20px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: hsl(var(--primary));
    background: hsl(var(--primary), 0.1);
}

.drop-zone-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.drop-zone h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.drop-zone p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Progress */
.transfer-progress {
    display: none;
    padding: 24px;
    margin-top: 20px;
}

.transfer-progress.active {
    display: block;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.file-icon {
    width: 48px;
    height: 48px;
    background: hsl(var(--primary), 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.file-details {
    flex: 1;
}

.file-name {
    font-weight: 600;
    margin-bottom: 4px;
    word-break: break-all;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.progress-bar {
    height: 12px;
    background: var(--border);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, hsl(var(--primary-dark)), hsl(var(--primary)));
    border-radius: 6px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.transfer-mode {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: hsl(var(--primary), 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-top: 12px;
}

/* ========================================
   Received Files
   ======================================== */

.received-files {
    padding: 24px;
    margin-top: 20px;
    display: none;
}

.received-files.active {
    display: block;
}

.received-files h3 {
    margin-bottom: 16px;
    font-size: 1rem;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--surface);
    border-radius: 12px;
}

.file-item .file-icon {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
}

.file-item .file-details {
    flex: 1;
}

.download-btn {
    padding: 10px 16px;
    background: hsl(var(--primary));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s;
}

.download-btn:hover {
    transform: scale(1.05);
}

/* ========================================
   Footer
   ======================================== */

footer {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

footer a {
    color: hsl(var(--primary-dark));
    text-decoration: none;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 480px) {
    .app-container {
        padding: 12px;
    }

    .logo {
        font-size: 2rem;
    }

    .glass {
        border-radius: 20px;
        padding: 24px;
    }

    .room-code-display {
        font-size: 2rem;
        letter-spacing: 6px;
    }

    .color-palette {
        grid-template-columns: repeat(4, 1fr);
        min-width: 180px;
    }
}

/* ========================================
   Animations
   ======================================== */

.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}