/* ==========================================================================
   ShareDrop - Components & Interactive UI Elements
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons & Form Controls
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.2;
    outline: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #6366f1);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--color-primary-glow);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-hover), #4f46e5);
    box-shadow: 0 6px 18px var(--color-primary-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-surface-sunken);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    border-color: var(--border-color-hover);
}

.btn-accent {
    background: linear-gradient(135deg, var(--color-accent), #059669);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

.btn-accent:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 8px 14px;
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 14px 30px;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}

.btn svg {
    width: 18px;
    height: 18px;
}

/* --------------------------------------------------------------------------
   Dropzone Upload Box
   -------------------------------------------------------------------------- */
.dropzone {
    border: 2px dashed var(--border-color);
    background-color: var(--bg-surface-sunken);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.dropzone:hover, .dropzone.drag-over {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
    transform: scale(1.01);
}

.dropzone-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.dropzone-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.dropzone-browse-link {
    color: var(--color-primary);
    text-decoration: underline;
    cursor: pointer;
}

.dropzone-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   File Queue List
   -------------------------------------------------------------------------- */
.file-list {
    margin-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background-color: var(--bg-surface-sunken);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.file-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
}

.file-item-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.file-item-size {
    font-size: 0.75rem;
    color: var(--text-muted);
    background-color: var(--bg-surface);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.file-remove-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
}

.file-remove-btn:hover {
    color: var(--color-danger);
    background-color: var(--color-danger-light);
}

/* --------------------------------------------------------------------------
   Settings Form (Expiry, Password)
   -------------------------------------------------------------------------- */
.share-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
}

@media (max-width: 600px) {
    .share-options-grid {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-select, .form-input {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.9375rem;
    font-family: inherit;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface-sunken);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition-fast);
}

.form-select:focus, .form-input:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
    background-color: var(--bg-surface);
}

/* --------------------------------------------------------------------------
   6-Digit Access Code & Share Modal / Card
   -------------------------------------------------------------------------- */
.code-display-card {
    background: linear-gradient(135deg, var(--bg-surface-sunken), var(--bg-surface));
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-xl);
    padding: 28px;
    text-align: center;
    box-shadow: var(--shadow-glow);
    animation: fadeIn 0.4s ease;
}

.code-badge-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
}

.code-big {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    background: var(--bg-surface);
    padding: 8px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.qr-wrapper {
    background: #ffffff;
    padding: 16px;
    border-radius: var(--radius-lg);
    display: inline-block;
    box-shadow: var(--shadow-md);
    margin: 16px 0;
}

.share-link-input-group {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

/* --------------------------------------------------------------------------
   Receive Code Input Box
   -------------------------------------------------------------------------- */
.code-input-group {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.code-digit-input {
    width: 52px;
    height: 60px;
    font-size: 1.75rem;
    font-family: var(--font-mono);
    font-weight: 700;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-surface-sunken);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition-fast);
}

.code-digit-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
    background-color: var(--bg-surface);
    transform: translateY(-2px);
}

@media (max-width: 480px) {
    .code-digit-input {
        width: 42px;
        height: 52px;
        font-size: 1.4rem;
    }
}

/* --------------------------------------------------------------------------
   LAN P2P Radar Scanner Component
   -------------------------------------------------------------------------- */
.radar-container {
    position: relative;
    width: 100%;
    max-width: 480px;
    height: 480px;
    margin: 20px auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.radar-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px dashed var(--border-color-hover);
    pointer-events: none;
}

.radar-circle-1 { width: 140px; height: 140px; }
.radar-circle-2 { width: 260px; height: 260px; }
.radar-circle-3 { width: 380px; height: 380px; }
.radar-circle-4 { width: 480px; height: 480px; }

.radar-sweep {
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent 0deg, transparent 300deg, var(--color-primary-glow) 360deg);
    animation: radarSpin 4s linear infinite;
    pointer-events: none;
}

@keyframes radarSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.my-device-center {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.device-avatar {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 0 20px var(--color-primary-glow);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.device-avatar:hover {
    transform: scale(1.1);
}

.device-avatar svg {
    width: 32px;
    height: 32px;
}

.device-name {
    margin-top: 8px;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--text-primary);
    background-color: var(--bg-surface);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* Peer Nodes around radar */
.peer-node {
    position: absolute;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: transform 0.3s ease;
    animation: popIn 0.3s ease;
}

.peer-node:hover {
    transform: scale(1.15);
}

.peer-avatar {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: var(--shadow-md);
    position: relative;
}

.peer-avatar::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 0; }
    100% { transform: scale(1); opacity: 0; }
}

@keyframes popIn {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* --------------------------------------------------------------------------
   Progress Bar
   -------------------------------------------------------------------------- */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--bg-surface-sunken);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 14px 0;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    transition: width 0.2s ease;
}

/* --------------------------------------------------------------------------
   Features & FAQ Grid (SEO & Authority)
   -------------------------------------------------------------------------- */
.features-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

.section-heading {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-box {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.feature-box:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.feature-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* FAQ Accordion */
.faq-section {
    padding: 40px 0 60px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: 18px 22px;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-answer {
    padding: 0 22px 18px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    display: none;
    line-height: 1.6;
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-item.open .faq-toggle-icon {
    transform: rotate(180deg);
}

.faq-toggle-icon {
    transition: transform var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Toast Notifications
   -------------------------------------------------------------------------- */
#toastContainer {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    padding: 12px 20px;
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: auto;
}

.toast.success { border-left: 4px solid var(--color-accent); }
.toast.error { border-left: 4px solid var(--color-danger); }
.toast.info { border-left: 4px solid var(--color-primary); }

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