/* ============================================
   ADAPTIVE FOCUS — Design System
   ============================================ */

:root {
    /* Color Palette */
    --bg-primary: #080c18;
    --bg-secondary: #0f1629;
    --bg-card: #141b2d;
    --bg-card-hover: #1a2340;
    --bg-input: #0d1220;

    --border-subtle: rgba(100, 116, 160, 0.12);
    --border-glow: rgba(96, 165, 250, 0.2);

    --text-primary: #e8ecf4;
    --text-secondary: #8b95b0;
    --text-muted: #5a6480;

    --accent-blue: #60a5fa;
    --accent-blue-dim: rgba(96, 165, 250, 0.15);
    --accent-emerald: #34d399;
    --accent-emerald-dim: rgba(52, 211, 153, 0.15);
    --accent-amber: #fbbf24;
    --accent-rose: #fb7185;

    --gradient-main: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
    --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
    --gradient-emerald: linear-gradient(135deg, #10b981 0%, #34d399 100%);

    /* Spacing */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* Shadows */
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-glow-blue: 0 0 40px rgba(96, 165, 250, 0.1);
    --shadow-glow-emerald: 0 0 40px rgba(52, 211, 153, 0.1);

    /* Transitions */
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Ambient Background
   ============================================ */
.ambient-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.3), transparent 70%);
    top: -10%;
    right: -10%;
    animation: float1 18s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(52, 211, 153, 0.25), transparent 70%);
    bottom: -5%;
    left: -10%;
    animation: float2 22s ease-in-out infinite;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
    top: 40%;
    left: 50%;
    animation: float3 20s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-40px, 30px) scale(1.05); }
    66% { transform: translate(20px, -20px) scale(0.95); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -40px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

@keyframes float3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, -30px) scale(1.08); }
}

/* ============================================
   Container
   ============================================ */
.container {
    position: relative;
    z-index: 1;
    max-width: 520px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInDown 0.8s var(--ease-out);
}

.logo-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    animation: pulse-glow 3s ease-in-out infinite;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(96, 165, 250, 0.3)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 20px rgba(96, 165, 250, 0.5)); transform: scale(1.05); }
}

.title {
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.1;
}

.title-accent {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--accent-blue);
    margin-top: 8px;
    opacity: 0.8;
}

.description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 16px;
    line-height: 1.7;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Form Card
   ============================================ */
.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 36px 32px;
    box-shadow: var(--shadow-card);
    animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
    position: relative;
    overflow: hidden;
}

.form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.3), rgba(52, 211, 153, 0.3), transparent);
}

/* ============================================
   Input Groups
   ============================================ */
.input-group {
    margin-bottom: 32px;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.input-label-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-icon {
    font-size: 1.1rem;
}

.input-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.input-value-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    font-variant-numeric: tabular-nums;
}

.energy-badge {
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
}

.workload-badge {
    background: var(--accent-emerald-dim);
    color: var(--accent-emerald);
}

/* ============================================
   Sliders
   ============================================ */
.slider-container {
    position: relative;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    background: var(--bg-input);
    position: relative;
    transition: box-shadow 0.3s var(--ease-out);
}

.slider:hover {
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.08);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid var(--bg-card);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
    transition: transform 0.2s var(--ease-spring), box-shadow 0.2s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.slider-energy::-webkit-slider-thumb {
    background: var(--gradient-blue);
}

.slider-workload::-webkit-slider-thumb {
    background: var(--gradient-emerald);
}

/* Firefox slider thumb */
.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid var(--bg-card);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider-energy::-moz-range-thumb {
    background: var(--accent-blue);
}

.slider-workload::-moz-range-thumb {
    background: var(--accent-emerald);
}

.slider::-moz-range-track {
    background: var(--bg-input);
    height: 8px;
    border-radius: 4px;
    border: none;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-status {
    margin-top: 10px;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    padding: 6px 16px;
    border-radius: 8px;
    transition: all 0.3s var(--ease-out);
}

.energy-status {
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
}

.workload-status {
    background: var(--accent-emerald-dim);
    color: var(--accent-emerald);
}

/* ============================================
   Submit Button
   ============================================ */
.submit-btn {
    width: 100%;
    padding: 18px 24px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--gradient-main);
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s var(--ease-out);
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.2), 0 2px 8px rgba(52, 211, 153, 0.15);
}

.submit-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(96, 165, 250, 0.3), 0 4px 12px rgba(52, 211, 153, 0.2);
}

.submit-btn:hover::before {
    opacity: 1;
}

.submit-btn:active {
    transform: translateY(0) scale(0.98);
}

.btn-icon {
    display: flex;
    align-items: center;
    transition: transform 0.3s var(--ease-out);
}

.submit-btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ============================================
   Result Card
   ============================================ */
.result-card {
    margin-top: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow-card);
    animation: resultSlideIn 0.6s var(--ease-spring);
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 3px 3px 0 0;
}

.result-short::before { background: var(--gradient-blue); }
.result-short { --ring-color: var(--accent-blue); }

.result-ideal::before { background: linear-gradient(90deg, var(--accent-blue), var(--accent-emerald)); }
.result-ideal { --ring-color: var(--accent-emerald); }

.result-deep::before { background: linear-gradient(90deg, var(--accent-emerald), var(--accent-amber)); }
.result-deep { --ring-color: var(--accent-amber); }

@keyframes resultSlideIn {
    0% { opacity: 0; transform: translateY(30px) scale(0.95); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 28px;
}

.result-emoji {
    font-size: 1.6rem;
}

.result-category {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
}

/* ============================================
   Circular Progress Ring
   ============================================ */
.progress-ring-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 28px;
}

.progress-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--bg-input);
    stroke-width: 8;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--progress-color, var(--accent-blue));
    stroke-width: 8;
    stroke-linecap: round;
    animation: ringFill 1.2s var(--ease-out) forwards;
    filter: drop-shadow(0 0 6px var(--progress-color));
}

@keyframes ringFill {
    0% { stroke-dasharray: 0 534; }
}

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

.progress-number {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.progress-unit {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 4px;
}

/* ============================================
   Result Details
   ============================================ */
.result-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.result-inputs {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.result-input-item {
    flex: 1;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.result-input-icon {
    font-size: 1rem;
}

.result-input-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.result-input-value {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.result-tip {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: rgba(251, 191, 36, 0.06);
    border: 1px solid rgba(251, 191, 36, 0.12);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    text-align: left;
}

.tip-icon {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.tip-text {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   Info Section
   ============================================ */
.info-section {
    margin-top: 48px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: all 0.3s var(--ease-out);
}

.info-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-blue);
}

.info-icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.info-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.info-text {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    text-align: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.footer p {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.footer strong {
    color: var(--text-secondary);
    font-weight: 600;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInDown {
    0% { opacity: 0; transform: translateY(-20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 480px) {
    .container {
        padding: 60px 24px 80px;
    }

    .title {
        font-size: 2.6rem;
    }

    .info-section {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .info-card {
        padding: 20px 16px;
    }
}

@media (max-width: 380px) {
    .form-card {
        padding: 28px 20px;
    }

    .result-card {
        padding: 32px 20px;
    }

    .progress-ring-container {
        width: 160px;
        height: 160px;
    }

    .progress-number {
        font-size: 2.8rem;
    }

    .result-inputs {
        flex-direction: column;
    }

    .title {
        font-size: 1.8rem;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

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

/* Selection */
::selection {
    background: rgba(96, 165, 250, 0.3);
    color: white;
}