/**
 * Time Flow - Zhween Classroom Tools
 *
 * Modern timer and stopwatch with cosmic visual design
 * Supports RTL languages and dark mode
 */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
    /* Brand Colors */
    --timeflow-primary: #15aebf;
    --timeflow-primary-hover: #0e9aa8;
    --timeflow-primary-light: rgba(21, 174, 191, 0.1);
    --timeflow-primary-glow: rgba(21, 174, 191, 0.4);

    /* Secondary Colors */
    --timeflow-secondary: #ff6b35;
    --timeflow-accent: #ffd93d;

    /* Surface Colors */
    --timeflow-bg: #0a0a1a;
    --timeflow-surface: rgba(255, 255, 255, 0.05);
    --timeflow-surface-hover: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --timeflow-text: #ffffff;
    --timeflow-text-secondary: rgba(255, 255, 255, 0.7);
    --timeflow-text-muted: rgba(255, 255, 255, 0.5);

    /* Border & Dividers */
    --timeflow-border: rgba(255, 255, 255, 0.1);
    --timeflow-border-light: rgba(255, 255, 255, 0.05);

    /* Status Colors */
    --timeflow-success: #7bed9f;
    --timeflow-warning: #ffa502;
    --timeflow-danger: #ff4757;

    /* Shadows */
    --timeflow-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --timeflow-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --timeflow-glow: 0 0 30px var(--timeflow-primary-glow);

    /* Spacing */
    --timeflow-panel-width: 280px;
    --timeflow-gap: 1rem;
    --timeflow-radius: 16px;
    --timeflow-radius-sm: 10px;

    /* Transitions */
    --timeflow-transition: 200ms ease;
}

/* ==========================================================================
   Base Container
   ========================================================================== */

.timeflow {
    display: flex;
    flex-direction: column;
    min-height: 95vh;
    height: 100%;
    background: var(--timeflow-bg);
    color: var(--timeflow-text);
    font-family: 'Poppins', 'Vazirmatn', -apple-system, BlinkMacSystemFont, sans-serif;
    overflow-x: hidden;
}

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

.timeflow__body {
    display: flex;
    flex: 1 1 auto;
    gap: var(--timeflow-gap);
    padding: var(--timeflow-gap);
    overflow: auto;
}

/* ==========================================================================
   Left Panel (Controls)
   ========================================================================== */

.timeflow__panel {
    width: var(--timeflow-panel-width);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    overflow-y: auto;
}

/* ==========================================================================
   Sections
   ========================================================================== */

.timeflow__section {
    background: var(--timeflow-surface);
    backdrop-filter: blur(10px);
    border-radius: var(--timeflow-radius);
    padding: 1rem;
    border: 1px solid var(--timeflow-border);
    transition: all var(--timeflow-transition);
}

.timeflow__section:hover {
    background: var(--timeflow-surface-hover);
}

.timeflow__section--display {
    text-align: center;
    background: linear-gradient(135deg, var(--timeflow-primary) 0%, var(--timeflow-primary-hover) 100%);
    border: none;
    color: white;
}

.timeflow__section--display:hover {
    background: linear-gradient(135deg, var(--timeflow-primary) 0%, var(--timeflow-primary-hover) 100%);
}

.timeflow__section--actions {
    margin-top: auto;
}

.timeflow__section--sound {
    padding: 0.75rem;
}

.timeflow__section-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--timeflow-primary);
    margin: 0 0 1rem 0;
}

.timeflow__section-title svg {
    opacity: 0.8;
}

/* ==========================================================================
   Mode Switcher
   ========================================================================== */

.timeflow__section--mode {
    padding: 0.5rem;
}

.timeflow__mode-switcher {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--timeflow-radius-sm);
    padding: 0.25rem;
}

.timeflow__mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    border: none;
    background: transparent;
    color: var(--timeflow-text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    border-radius: calc(var(--timeflow-radius-sm) - 2px);
    transition: all var(--timeflow-transition);
}

.timeflow__mode-btn:hover {
    color: var(--timeflow-text-secondary);
}

.timeflow__mode-btn.active {
    color: var(--timeflow-text);
    background: var(--timeflow-primary);
    box-shadow: 0 2px 8px var(--timeflow-primary-glow);
}

.timeflow__mode-btn svg {
    flex-shrink: 0;
}

/* ==========================================================================
   Time Inputs
   ========================================================================== */

.timeflow__time-inputs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.timeflow__input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.timeflow__input-group label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--timeflow-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeflow__input-group input {
    width: 55px;
    padding: 0.5rem;
    border: 2px solid var(--timeflow-border);
    border-radius: var(--timeflow-radius-sm);
    background: rgba(0, 0, 0, 0.4);
    font-size: 1.125rem;
    font-weight: 700;
    text-align: center;
    color: var(--timeflow-primary);
    transition: all var(--timeflow-transition);
}

.timeflow__input-group input:focus {
    outline: none;
    border-color: var(--timeflow-primary);
    box-shadow: 0 0 0 3px var(--timeflow-primary-light), var(--timeflow-glow);
    background: rgba(21, 174, 191, 0.1);
}

/* Hide number input spinners */
.timeflow__input-group input::-webkit-outer-spin-button,
.timeflow__input-group input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.timeflow__input-group input[type=number] {
    -moz-appearance: textfield;
}

.timeflow__time-sep {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--timeflow-text-muted);
    margin-top: 1.25rem;
}

/* ==========================================================================
   Presets
   ========================================================================== */

.timeflow__presets {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.timeflow__preset-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--timeflow-border);
    border-radius: var(--timeflow-radius-sm);
    background: rgba(0, 0, 0, 0.3);
    color: var(--timeflow-text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--timeflow-transition);
}

.timeflow__preset-btn:hover {
    border-color: var(--timeflow-primary);
    color: var(--timeflow-primary);
    background: var(--timeflow-primary-light);
}

.timeflow__preset-btn:active {
    transform: scale(0.95);
}

/* ==========================================================================
   Timer Display
   ========================================================================== */

.timeflow__display {
    font-size: 2.25rem;
    font-weight: 800;
    font-family: 'Courier New', monospace;
    line-height: 1.2;
    direction: ltr;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.timeflow__status {
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0.85;
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.timeflow__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--timeflow-radius-sm);
    cursor: pointer;
    transition: all var(--timeflow-transition);
}

.timeflow__btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.timeflow__btn--primary {
    background: var(--timeflow-primary);
    color: white;
    box-shadow: 0 4px 12px var(--timeflow-primary-glow);
}

.timeflow__btn--primary:hover:not(:disabled) {
    background: var(--timeflow-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--timeflow-primary-glow);
}

.timeflow__btn--primary:active:not(:disabled) {
    transform: translateY(0);
}

.timeflow__btn--secondary {
    background: var(--timeflow-surface);
    color: var(--timeflow-text);
    border: 1px solid var(--timeflow-border);
}

.timeflow__btn--secondary:hover:not(:disabled) {
    background: var(--timeflow-surface-hover);
    border-color: var(--timeflow-primary);
}

.timeflow__btn--full {
    width: 100%;
}

.timeflow__btn-group {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.timeflow__btn-group .timeflow__btn {
    flex: 1;
}

/* ==========================================================================
   Sound Toggle
   ========================================================================== */

.timeflow__sound-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--timeflow-border);
    border-radius: var(--timeflow-radius-sm);
    color: var(--timeflow-text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--timeflow-transition);
}

.timeflow__sound-btn:hover {
    border-color: var(--timeflow-primary);
    color: var(--timeflow-primary);
}

.timeflow__sound-btn[aria-pressed="true"] {
    color: var(--timeflow-success);
    border-color: var(--timeflow-success);
}

.timeflow__sound-btn[aria-pressed="false"] {
    color: var(--timeflow-text-muted);
}

/* ==========================================================================
   Main Content Area (Visual Display)
   ========================================================================== */

.timeflow__main {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.timeflow__visual {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 50%, #16213e 100%);
    border-radius: var(--timeflow-radius);
    overflow: hidden;
    border: 1px solid var(--timeflow-border);
    min-height: 350px;
}

/* Cosmic Background */
.timeflow__cosmic-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(21, 174, 191, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 217, 61, 0.05) 0%, transparent 60%);
    animation: timeflow-bg-pulse 8s ease-in-out infinite;
}

@keyframes timeflow-bg-pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* Grid Overlay */
.timeflow__grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(21, 174, 191, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21, 174, 191, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: timeflow-grid-move 30s linear infinite;
}

@keyframes timeflow-grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(40px, 40px); }
}

/* ==========================================================================
   Progress Ring
   ========================================================================== */

.timeflow__ring-container {
    position: relative;
    width: min(280px, 70vw);
    height: min(280px, 70vw);
    z-index: 10;
}

.timeflow__ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
    filter: drop-shadow(0 0 10px var(--timeflow-primary-glow));
}

.timeflow__ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 8;
}

.timeflow__ring-progress {
    fill: none;
    stroke: var(--timeflow-primary);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48; /* 2 * PI * 90 */
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 0.5s ease, stroke 0.3s ease;
}

.timeflow__ring-progress.running {
    stroke: var(--timeflow-primary);
}

.timeflow__ring-progress.countdown {
    stroke: var(--timeflow-danger);
    animation: timeflow-ring-pulse 0.5s ease-in-out infinite;
}

.timeflow__ring-progress.finished {
    stroke: var(--timeflow-success);
}

@keyframes timeflow-ring-pulse {
    0%, 100% { opacity: 1; filter: drop-shadow(0 0 10px var(--timeflow-danger)); }
    50% { opacity: 0.7; filter: drop-shadow(0 0 20px var(--timeflow-danger)); }
}

.timeflow__ring-display {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.timeflow__ring-time {
    font-size: clamp(2rem, 8vw, 3.5rem);
    font-weight: 800;
    font-family: 'Courier New', monospace;
    color: var(--timeflow-text);
    direction: ltr;
    text-shadow: 0 0 20px var(--timeflow-primary-glow);
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.timeflow__ring-time.running {
    color: var(--timeflow-primary);
}

.timeflow__ring-time.countdown {
    color: var(--timeflow-danger);
    animation: timeflow-time-pulse 0.5s ease-in-out infinite;
}

.timeflow__ring-time.finished {
    color: var(--timeflow-success);
    animation: timeflow-celebration 1s ease-in-out infinite;
}

@keyframes timeflow-time-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes timeflow-celebration {
    0%, 100% { transform: scale(1) rotate(0); }
    25% { transform: scale(1.05) rotate(1deg); }
    75% { transform: scale(1.05) rotate(-1deg); }
}

.timeflow__ring-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--timeflow-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 0.5rem;
}

/* ==========================================================================
   Particles
   ========================================================================== */

.timeflow__particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    overflow: hidden;
}

.timeflow__particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--timeflow-primary);
    border-radius: 50%;
    opacity: 0;
    animation: timeflow-float 6s infinite ease-in-out;
}

@keyframes timeflow-float {
    0% {
        transform: translateY(100%) scale(0);
        opacity: 0;
    }
    10% { opacity: 0.6; }
    90% { opacity: 0.3; }
    100% {
        transform: translateY(-100vh) scale(1.5);
        opacity: 0;
    }
}

/* ==========================================================================
   Completion Overlay
   ========================================================================== */

.timeflow__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.timeflow__overlay--visible {
    display: flex;
}

.timeflow__overlay-content {
    background: linear-gradient(135deg, rgba(30, 30, 50, 0.95), rgba(20, 20, 40, 0.95));
    border: 1px solid var(--timeflow-border);
    padding: 2.5rem;
    border-radius: var(--timeflow-radius);
    text-align: center;
    box-shadow: var(--timeflow-shadow-lg), var(--timeflow-glow);
    animation: timeflow-pop 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 350px;
    width: 100%;
}

.timeflow__overlay-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: timeflow-bounce 0.6s ease infinite;
}

@keyframes timeflow-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.timeflow__overlay-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--timeflow-primary);
    margin: 0 0 0.5rem 0;
}

.timeflow__overlay-text {
    color: var(--timeflow-text-secondary);
    margin: 0 0 1.5rem 0;
    font-size: 1rem;
}

@keyframes timeflow-pop {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

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

@media (max-width: 900px) {
    .timeflow__body {
        flex-direction: column;
    }

    .timeflow__panel {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .timeflow__section {
        flex: 1 1 calc(50% - 0.25rem);
        min-width: 140px;
    }

    .timeflow__section--mode {
        flex-basis: 100%;
        order: -1;
    }

    .timeflow__section--actions {
        flex-basis: 100%;
        margin-top: 0;
    }

    .timeflow__section--sound {
        flex-basis: 100%;
    }

    .timeflow__visual {
        min-height: 300px;
    }
}

@media (max-width: 600px) {
    :root {
        --timeflow-panel-width: 100%;
        --timeflow-gap: 0.75rem;
    }

    .timeflow__section {
        flex-basis: 100%;
    }

    .timeflow__time-inputs {
        gap: 0.35rem;
    }

    .timeflow__input-group input {
        width: 48px;
        font-size: 1rem;
        padding: 0.4rem;
    }

    .timeflow__display {
        font-size: 1.75rem;
    }

    .timeflow__presets {
        gap: 0.35rem;
    }

    .timeflow__preset-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.7rem;
    }

    .timeflow__btn-group {
        flex-wrap: wrap;
    }

    .timeflow__btn-group .timeflow__btn {
        flex: 1 1 auto;
    }

    .timeflow__ring-container {
        width: min(240px, 80vw);
        height: min(240px, 80vw);
    }

    .timeflow__visual {
        min-height: 280px;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .timeflow__cosmic-bg,
    .timeflow__grid-overlay,
    .timeflow__particle,
    .timeflow__ring-progress,
    .timeflow__ring-time,
    .timeflow__overlay-icon {
        animation: none;
    }

    .timeflow__overlay-content {
        animation: none;
    }

    .timeflow__ring-progress {
        transition: stroke-dashoffset 0.3s ease;
    }
}

/* ==========================================================================
   RTL Support
   ========================================================================== */

[dir="rtl"] .timeflow__display,
[dir="rtl"] .timeflow__ring-time {
    direction: ltr;
}

[dir="rtl"] .timeflow {
    font-family: 'Vazirmatn', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .timeflow__panel,
    .timeflow__overlay {
        display: none !important;
    }

    .timeflow__body {
        display: block;
        padding: 0;
    }

    .timeflow__visual {
        page-break-inside: avoid;
        background: white;
    }

    .timeflow__ring-time {
        color: #000;
        text-shadow: none;
    }
}