/* ============================================
   Components — Reusable UI elements
   ============================================ */

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-xl);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    color: var(--text);
    cursor: pointer;
    box-shadow: var(--glow-idle);
    transition: box-shadow var(--transition-glow-out),
                border-color var(--transition-glow-out),
                background var(--transition-glow-out),
                color var(--transition-glow-out);
}

.btn:hover {
    box-shadow: var(--glow-hover);
    transition: box-shadow var(--transition-glow-in),
                border-color var(--transition-glow-in),
                background var(--transition-glow-in),
                color var(--transition-glow-in);
}

.btn:active {
    box-shadow: var(--glow-active);
}

.btn:focus-visible {
    outline: var(--glow-focus-outline);
    outline-offset: var(--glow-focus-offset);
    box-shadow: var(--glow-hover);
}

.btn:disabled,
.btn[disabled] {
    box-shadow: var(--glow-disabled);
    cursor: not-allowed;
    opacity: 0.5;
}

.btn--primary {
    border-color: var(--cyan-dim);
    color: var(--cyan);
    animation: clickable-shimmer 5s ease-in-out infinite,
               border-shimmer 5s ease-in-out infinite;
}

.btn--primary:hover {
    animation: none;
    background: rgba(255, 184, 0, 0.08);
    border-color: var(--amber);
    color: var(--amber);
}

.btn--secondary {
    border-color: var(--border);
    color: var(--text-dim);
    animation: clickable-shimmer-dim 5s ease-in-out infinite,
               border-shimmer-dim 5s ease-in-out infinite;
}

.btn--secondary:hover {
    animation: none;
    border-color: var(--amber);
    color: var(--amber);
}

/* Cards */
.card {
    border: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    padding: var(--space-xl);
    box-shadow: var(--glow-idle);
    transition: box-shadow var(--transition-glow-out),
                border-color var(--transition-glow-out);
}

.card:hover {
    border-color: var(--border-bright);
    box-shadow: var(--glow-hover);
    transition: box-shadow var(--transition-glow-in),
                border-color var(--transition-glow-in);
}

.card:active {
    box-shadow: var(--glow-active);
}

.card:focus-visible {
    outline: var(--glow-focus-outline);
    outline-offset: var(--glow-focus-offset);
    box-shadow: var(--glow-hover);
}

.card__icon {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-md);
}

.card__title {
    font-size: var(--text-lg);
    color: var(--text-bright);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.02em;
}

.card__text {
    color: var(--text-dim);
    font-size: var(--text-sm);
    line-height: 1.7;
}

.card__list {
    margin-top: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.card__list li {
    color: var(--text-dim);
    font-size: var(--text-sm);
    padding-left: var(--space-md);
    position: relative;
}

.card__list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--cyan-dim);
    font-size: var(--text-xs);
}

/* Tags */
.tag {
    display: inline-block;
    padding: 2px var(--space-sm);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    color: var(--text-dim);
    box-shadow: var(--glow-idle);
    transition: box-shadow var(--transition-glow-out),
                border-color var(--transition-glow-out);
}

.tag:hover {
    border-color: var(--border-bright);
    box-shadow: var(--glow-hover);
    transition: box-shadow var(--transition-glow-in),
                border-color var(--transition-glow-in);
}

.tag--cyan {
    border-color: var(--cyan-dim);
    color: var(--cyan-dim);
}

.tag--orange {
    border-color: var(--orange-dim);
    color: var(--orange);
}

/* Form */
.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.form__label {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-card);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: var(--text-base);
    box-shadow: var(--glow-idle);
    transition: box-shadow var(--transition-glow-out),
                border-color var(--transition-glow-out);
}

.form__input:hover,
.form__textarea:hover {
    box-shadow: var(--glow-hover);
    transition: box-shadow var(--transition-glow-in),
                border-color var(--transition-glow-in);
}

.form__input:focus,
.form__textarea:focus {
    outline: var(--glow-focus-outline);
    outline-offset: var(--glow-focus-offset);
    border-color: var(--cyan);
    box-shadow: var(--glow-active);
}

.form__input:disabled,
.form__textarea:disabled {
    box-shadow: var(--glow-disabled);
    cursor: not-allowed;
    opacity: 0.5;
}

.form__textarea {
    resize: vertical;
    min-height: 150px;
}

/* HTML5 validation styling */
.form__input:invalid:not(:placeholder-shown),
.form__textarea:invalid:not(:placeholder-shown) {
    border-color: var(--orange-dim);
}

.form__input:valid:not(:placeholder-shown),
.form__textarea:valid:not(:placeholder-shown) {
    border-color: var(--cyan-dim);
}

/* Divider */
.divider {
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    margin: var(--space-2xl) 0;
}

/* Client list */
.client-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    align-items: center;
    justify-content: center;
}

.client-list__name {
    font-size: var(--text-lg);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    transition: color var(--transition-fast);
}

.client-list__name:hover {
    color: var(--text);
}

/* Volume control — Tron Legacy styled speaker icon + vertical expandable slider */
.volume-control {
    position: fixed;
    top: 0;
    right: var(--space-sm);
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.volume-control__btn {
    width: 36px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid transparent;
    color: var(--cyan-dim);
    cursor: pointer;
    flex-shrink: 0;
    transition: color var(--transition-glow-in);
}

.volume-control__btn:hover {
    color: var(--cyan);
}

.volume-control__btn svg {
    filter: drop-shadow(0 0 3px rgba(0, 229, 255, 0.4));
}

.volume-control__btn:hover svg {
    filter: drop-shadow(0 0 6px rgba(0, 229, 255, 0.6));
}

.volume-control__btn:focus-visible {
    outline: var(--glow-focus-outline);
    outline-offset: var(--glow-focus-offset);
}

/* Slider panel — vertical dropdown below the icon */
.volume-control__panel {
    overflow: hidden;
    height: 0;
    opacity: 0;
    transition: height 300ms ease, opacity 250ms ease, padding 300ms ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--border);
    border-top: none;
    box-sizing: border-box;
    width: 32px;
    padding: 0;
    position: relative;
}

.volume-control:hover .volume-control__panel,
.volume-control--open .volume-control__panel {
    height: 110px;
    opacity: 1;
    padding: var(--space-sm) 0;
}

/* Vertical range slider — rotated horizontal slider for reliable cross-browser styling */
.volume-control__slider {
    -webkit-appearance: none;
    appearance: none;
    width: 80px;
    height: 2px;
    background: rgba(0, 229, 255, 0.15);
    outline: none;
    cursor: pointer;
    border-radius: 0;
    margin: 0;
    padding: 0;
    transform: rotate(-90deg);
}

.volume-control__slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--cyan);
    border: none;
    cursor: pointer;
    box-shadow: 0 0 6px var(--cyan), 0 0 15px rgba(0, 229, 255, 0.4);
}

.volume-control__slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--cyan);
    border: none;
    cursor: pointer;
    box-shadow: 0 0 6px var(--cyan), 0 0 15px rgba(0, 229, 255, 0.4);
    border-radius: 0;
}

.volume-control__slider::-moz-range-track {
    height: 2px;
    background: rgba(0, 229, 255, 0.15);
    border: none;
}

.volume-control__slider:focus-visible {
    outline: none;
}

.volume-control__slider:focus-visible::-webkit-slider-thumb {
    box-shadow: 0 0 8px var(--cyan), 0 0 20px rgba(0, 229, 255, 0.6);
}

/* Muted state — dimmed icon */
.volume-control--muted .volume-control__btn {
    color: var(--text-muted);
}

.volume-control--muted .volume-control__btn svg {
    filter: none;
}

.volume-control--muted .volume-control__slider::-webkit-slider-thumb {
    background: var(--text-muted);
    box-shadow: none;
}

.volume-control--muted .volume-control__slider::-moz-range-thumb {
    background: var(--text-muted);
    box-shadow: none;
}