/* ========================================
   ACTIVE RECALL – POLISHED MOBILE UI
   ======================================== */

:root {
    /* Calm color palette */
    --primary: #5b4b8a;
    --primary-light: #7d6ba3;
    --secondary: #9b8bc1;
    --accent: #4a9d6f;
    --accent-light: #6db88a;
    --light-bg: #f8f6fc;
    --card-bg: #ffffff;
    --text-dark: #2d1b4e;
    --text-muted: #6b5b7f;
    --border: #e8dff5;
    --border-light: #f0ebf8;
    --success: #4a9d6f;
    --warning: #c97a4a;
    --shadow-sm: 0 2px 6px rgba(45, 27, 78, 0.08);
    --shadow-md: 0 4px 12px rgba(45, 27, 78, 0.12);
    --shadow-lg: 0 8px 24px rgba(45, 27, 78, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--light-bg) 0%, #f5f1fb 100%);
    color: var(--text-dark);
    line-height: 1.6;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#app {
    width: 100%;
    flex: 1;
    background: transparent;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 0 auto;
}

/* Mobile First (max 768px) */
@media (max-width: 768px) {
    #app {
        max-width: 100%;
    }
}

/* Tablet & Desktop (769px+) */
@media (min-width: 769px) {
    #app {
        max-width: 600px;
    }
    
    #progressBarContainer {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* ========================================
   PROGRESS BAR
   ======================================== */

#progressBarContainer {
    width: 100%;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm) var(--spacing-md);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.progress-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.progress-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
}

.progress-percentage {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

.progress-bar-track {
    width: 100%;
    height: 6px;
    background: var(--border-light);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 3px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-steps {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.progress-step {
    flex: 1;
    height: 3px;
    background: var(--border-light);
    border-radius: 1.5px;
    transition: background 0.3s ease;
}

.progress-step.active {
    background: var(--accent);
}

.progress-step.completed {
    background: var(--success);
}

/* ========================================
   SCREEN BASE
   ======================================== */

.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg) var(--spacing-md);
    gap: var(--spacing-md);
    overflow-y: auto;
    animation: fadeIn 0.35s ease-out;
    height: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
}

.screen-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.screen-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.screen-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ========================================
   HOME SCREEN
   ======================================== */

.home-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    overflow-y: auto;
}

@media (min-width: 769px) {
    .home-container {
        height: auto;
        min-height: 100vh;
        padding: var(--spacing-xl) var(--spacing-lg);
        justify-content: center;
    }
}

.home-header {
    text-align: center;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.home-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.home-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
}

.home-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.home-stats {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-md);
    border: 1px solid var(--border-light);
    text-align: center;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.home-stats:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
    font-weight: 500;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
    display: inline-block;
    width: 100%;
    position: relative;
    overflow: visible;
    line-height: 1.5;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: left 0.3s ease;
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(91, 75, 138, 0.25);
    font-weight: 700;
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(91, 75, 138, 0.35);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(91, 75, 138, 0.25);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--primary);
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--light-bg);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-tertiary {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-light);
    font-weight: 500;
    box-shadow: none;
}

.btn-tertiary:hover {
    background: var(--light-bg);
    color: var(--text-dark);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
}

/* ========================================
   FEEDBACK BUTTON
   ======================================== */

.feedback-button {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
    z-index: 50;
}

.feedback-button:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.feedback-button:active {
    transform: scale(0.95);
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
    letter-spacing: -0.3px;
}

.form-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

.form-input,
.form-textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-dark);
    transition: var(--transition-fast);
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(91, 75, 138, 0.08), var(--shadow-md);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ========================================
   CARDS & SECTIONS
   ======================================== */

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: var(--spacing-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.3px;
}

.card-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========================================
   TIMER SCREEN
   ======================================== */

.timer-display {
    font-size: 4.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    font-variant-numeric: tabular-nums;
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    font-family: 'Monaco', 'Menlo', monospace;
    letter-spacing: 2px;
}

.timer-label {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timer-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.timer-controls .btn {
    flex: 1;
}

/* ========================================
   RECALL SCREEN
   ======================================== */

.recall-header {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 15px rgba(74, 157, 111, 0.25);
}

.recall-header-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.recall-section {
    margin-bottom: var(--spacing-lg);
}

.recall-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

/* ========================================
   REFLECTION SCREEN
   ======================================== */

.reflection-item {
    background: var(--card-bg);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.reflection-item:hover {
    box-shadow: var(--shadow-md);
}

.reflection-prompt {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.reflection-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-dark);
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.reflection-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(91, 75, 138, 0.08), var(--shadow-md);
}

/* ========================================
   UTILITY
   ======================================== */

.text-center {
    text-align: center;
}

.mt-auto {
    margin-top: auto;
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none;
}

/* ========================================
   SCROLLING
   ======================================== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   TOOLTIPS
   ======================================== */

.tooltip-wrapper {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
    margin-left: 0.4rem;
    flex-shrink: 0;
}

.tooltip-wrapper:hover .tooltip-icon {
    background: var(--primary-light);
}

.tooltip-text {
    visibility: hidden;
    position: absolute;
    z-index: 1000;
    top: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-dark);
    color: white;
    padding: 0.75rem var(--spacing-sm);
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: normal;
    max-width: 200px;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    line-height: 1.4;
}

.tooltip-text::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: var(--text-dark);
}

.tooltip-wrapper:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

.label-with-tooltip {
    display: flex;
    align-items: center;
    width: 100%;
}

.label-with-tooltip .tooltip-wrapper {
    margin-left: auto;
}

/* ========================================
   CELEBRATION SCREEN
   ======================================== */

.celebration-screen {
    position: relative;
}

.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.confetti {
    position: fixed;
    pointer-events: none;
    font-size: 1.5rem;
    opacity: 1;
    animation: fall-confetti ease-in forwards;
    z-index: 11;
}

@keyframes fall-confetti {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) translateX(100px) rotate(360deg);
        opacity: 0;
    }
}

@keyframes celebrate-pop {
    0% {
        transform: scale(0) rotate(-45deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

.celebration-suggestion {
    background: linear-gradient(135deg, var(--light-bg) 0%, rgba(159, 139, 193, 0.05) 100%);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    padding: var(--spacing-lg);
    animation: slide-up 0.5s ease-out;
}

.celebration-suggestion:nth-child(2) {
    animation-delay: 0.1s;
}

.celebration-suggestion:nth-child(3) {
    animation-delay: 0.2s;
}

.celebration-expandable {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    overflow: hidden;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.celebration-expandable:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.celebration-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    cursor: pointer;
    user-select: none;
}

.celebration-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    animation: expand-slide 0.3s ease-out;
    max-height: 2000px;
    overflow: auto;
}

@keyframes expand-slide {
    from {
        opacity: 0;
        max-height: 0;
        overflow: hidden;
    }
    to {
        opacity: 1;
        max-height: 2000px;
    }
}

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

/* ========================================
   RESPONSIVE
   ======================================== */

/* Mobile (max 600px height) */
@media (max-height: 600px) {
    .screen {
        padding: var(--spacing-md);
    }

    .timer-display {
        font-size: 3.5rem;
    }

    .card {
        padding: var(--spacing-md);
    }
}

/* Tablet & larger screens (min 769px width) */
@media (min-width: 769px) {
    .screen {
        padding: var(--spacing-xl) var(--spacing-lg);
        gap: var(--spacing-lg);
    }

    .screen-title {
        font-size: 2.5rem;
    }

    .home-header {
        margin-top: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }

    .home-title {
        font-size: 3rem;
    }

    .timer-display {
        font-size: 5rem;
        margin: var(--spacing-xl) 0;
    }

    .card {
        padding: var(--spacing-xl);
        border-radius: 20px;
    }

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

    .form-input,
    .form-textarea {
        padding: var(--spacing-lg);
        border-radius: 14px;
        font-size: 1.05rem;
    }

    .home-actions {
        max-width: 500px;
        margin: 0 auto;
    }

    .form-group {
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .form-label {
        font-size: 1.1rem;
    }
}

/* Large desktop (min 1024px) */
@media (min-width: 1024px) {
    #app {
        max-width: 700px;
    }

    .home-header {
        margin-top: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }

    .home-title {
        font-size: 3.5rem;
    }

    .timer-display {
        font-size: 5.5rem;
        letter-spacing: 3px;
    }

    .screen-title {
        font-size: 2.8rem;
        margin-bottom: var(--spacing-lg);
    }

    .stat-number {
        font-size: 3rem;
    }
}