/**
 * Advanced AP Calculator Suite - Styles
 * Version: 3.0.0
 * Albert.io inspired design with future-proof architecture
 */

/* ========================================
   ROOT VARIABLES
======================================== */
:root {
    --calc-primary: #667eea;
    --calc-primary-dark: #5568d3;
    --calc-secondary: #764ba2;
    --calc-accent: #3b82f6;
    --calc-success: #10b981;
    --calc-warning: #f59e0b;
    --calc-danger: #ef4444;
    
    --calc-score-5: #10b981;
    --calc-score-4: #3b82f6;
    --calc-score-3: #f59e0b;
    --calc-score-2: #f97316;
    --calc-score-1: #ef4444;
    
    --calc-neutral-900: #111827;
    --calc-neutral-800: #1f2937;
    --calc-neutral-700: #374151;
    --calc-neutral-600: #4b5563;
    --calc-neutral-500: #6b7280;
    --calc-neutral-400: #9ca3af;
    --calc-neutral-300: #d1d5db;
    --calc-neutral-200: #e5e7eb;
    --calc-neutral-100: #f3f4f6;
    --calc-neutral-50: #f9fafb;
    --calc-white: #ffffff;
    
    --calc-gradient: linear-gradient(135deg, var(--calc-primary) 0%, var(--calc-secondary) 100%);
    --calc-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --calc-shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --calc-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --calc-shadow-xl: 0 20px 40px rgba(102, 126, 234, 0.25);
    
    --calc-radius-sm: 8px;
    --calc-radius-md: 12px;
    --calc-radius-lg: 16px;
    --calc-radius-xl: 20px;
    
    --calc-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   CALCULATOR CONTAINER
======================================== */
.ap-calculator-advanced {
    max-width: 1000px;
    margin: 60px auto;
    padding: 0 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.calculator-wrapper-advanced {
    background: var(--calc-white);
    border-radius: var(--calc-radius-xl);
    box-shadow: var(--calc-shadow-xl);
    overflow: hidden;
    position: relative;
}

/* ========================================
   HEADER SECTION
======================================== */
.calc-header-advanced {
    background: var(--calc-gradient);
    color: var(--calc-white);
    padding: 40px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.calc-header-advanced::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotateGradient 10s linear infinite;
}

@keyframes rotateGradient {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.header-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    animation: bounce 2s ease-in-out infinite;
    display: inline-block;
}

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

.calc-title-advanced {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 0 0 10px 0;
    position: relative;
    z-index: 1;
}

.calc-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
    position: relative;
    z-index: 1;
}

/* ========================================
   CURVE SELECTOR
======================================== */
.curve-selector-section {
    padding: 30px;
    background: var(--calc-neutral-50);
    border-bottom: 2px solid var(--calc-neutral-200);
}

.curve-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    color: var(--calc-neutral-700);
    margin-bottom: 15px;
}

.label-icon {
    font-size: 1.3rem;
}

.curve-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
}

.curve-radio {
    position: relative;
    cursor: pointer;
    display: block;
}

.curve-radio input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.curve-radio .radio-label {
    display: block;
    padding: 12px 20px;
    background: var(--calc-white);
    border: 2px solid var(--calc-neutral-300);
    border-radius: var(--calc-radius-md);
    text-align: center;
    font-weight: 600;
    color: var(--calc-neutral-700);
    transition: var(--calc-transition);
}

.curve-radio input[type="radio"]:checked + .radio-label {
    background: var(--calc-gradient);
    color: var(--calc-white);
    border-color: var(--calc-primary);
    box-shadow: var(--calc-shadow-md);
}

.curve-radio:hover .radio-label {
    border-color: var(--calc-primary);
    transform: translateY(-2px);
}

/* ========================================
   INPUT FORM
======================================== */
.calc-form-advanced {
    padding: 40px 30px;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--calc-neutral-800);
    margin: 0 0 20px 0;
}

.title-icon {
    font-size: 1.6rem;
}

.input-grid-advanced {
    display: grid;
    gap: 30px;
}

.input-field-advanced {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-field-advanced label {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.field-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--calc-neutral-800);
}

.field-subtitle {
    font-size: 0.9rem;
    color: var(--calc-neutral-500);
}

/* Input with max value display */
.input-with-slider {
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
}

.calc-input-advanced {
    flex: 1;
    padding: 15px 20px;
    font-size: 1.2rem;
    font-weight: 600;
    border: 2px solid var(--calc-neutral-300);
    border-radius: var(--calc-radius-md);
    background: var(--calc-white);
    color: var(--calc-neutral-800);
    transition: var(--calc-transition);
    text-align: center;
}

.calc-input-advanced:focus {
    outline: none;
    border-color: var(--calc-primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.calc-input-advanced:hover {
    border-color: var(--calc-neutral-400);
}

.input-max {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--calc-neutral-500);
}

/* Range Slider */
.score-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--calc-neutral-200);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.score-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--calc-gradient);
    cursor: pointer;
    box-shadow: var(--calc-shadow-md);
    transition: var(--calc-transition);
}

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

.score-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--calc-gradient);
    cursor: pointer;
    border: none;
    box-shadow: var(--calc-shadow-md);
    transition: var(--calc-transition);
}

.score-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
}

.score-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--calc-neutral-500);
    font-weight: 600;
}

/* Calculate Button */
.calc-button-advanced {
    width: 100%;
    padding: 18px 30px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--calc-white);
    background: var(--calc-gradient);
    border: none;
    border-radius: var(--calc-radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    box-shadow: var(--calc-shadow-lg);
    transition: var(--calc-transition);
    position: relative;
    overflow: hidden;
}

.calc-button-advanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s;
}

.calc-button-advanced:hover::before {
    left: 100%;
}

.calc-button-advanced:hover {
    transform: translateY(-3px);
    box-shadow: var(--calc-shadow-xl);
}

.calc-button-advanced:active {
    transform: translateY(-1px);
}

.btn-icon {
    font-size: 1.4rem;
}

.btn-arrow {
    font-size: 1.5rem;
    transition: transform 0.3s;
}

.calc-button-advanced:hover .btn-arrow {
    transform: translateX(5px);
}

/* ========================================
   RESULTS SECTION
======================================== */
.calc-results-advanced {
    padding: 40px 30px;
    background: linear-gradient(180deg, var(--calc-neutral-50) 0%, var(--calc-white) 100%);
    border-top: 3px solid var(--calc-primary);
}

.calc-results-advanced.hidden {
    display: none;
}

.results-header {
    text-align: center;
    margin-bottom: 30px;
}

.results-header h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--calc-neutral-900);
    margin: 0 0 8px 0;
}

.results-subtitle {
    font-size: 1rem;
    color: var(--calc-neutral-600);
    margin: 0;
}

.curve-year-display {
    font-weight: 700;
    color: var(--calc-primary);
}

.results-main-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    margin-bottom: 30px;
}

/* AP Score Badge */
.ap-score-badge {
    background: var(--calc-white);
    border-radius: var(--calc-radius-xl);
    padding: 30px;
    box-shadow: var(--calc-shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.score-number {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    background: var(--calc-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    animation: scorePopIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scorePopIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.score-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--calc-neutral-600);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.score-description {
    font-size: 1rem;
    font-weight: 600;
    color: var(--calc-neutral-700);
}

/* Score Breakdown */
.score-breakdown {
    background: var(--calc-white);
    border-radius: var(--calc-radius-xl);
    padding: 30px;
    box-shadow: var(--calc-shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.breakdown-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakdown-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--calc-neutral-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.breakdown-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--calc-neutral-800);
}

.breakdown-bar {
    height: 10px;
    background: var(--calc-neutral-200);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.bar-fill {
    height: 100%;
    background: var(--calc-gradient);
    border-radius: 5px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.mcq-bar {
    background: linear-gradient(90deg, #3b82f6, #2563eb);
}

.frq-bar {
    background: linear-gradient(90deg, #10b981, #059669);
}

/* Essay Scores */
.essay-scores {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    padding-top: 15px;
    border-top: 2px solid var(--calc-neutral-200);
}

.essay-score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 12px;
    background: var(--calc-neutral-50);
    border-radius: var(--calc-radius-md);
    text-align: center;
}

.essay-icon {
    font-size: 1.5rem;
}

.essay-name {
    font-size: 0.85rem;
    color: var(--calc-neutral-600);
    font-weight: 600;
}

.essay-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--calc-primary);
}

/* Score Range Info */
.score-range-info {
    background: var(--calc-white);
    border-radius: var(--calc-radius-lg);
    padding: 20px;
    box-shadow: var(--calc-shadow-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.range-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--calc-neutral-700);
}

.range-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--calc-primary);
}

/* Disclaimer */
.results-disclaimer {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 15px 20px;
    border-radius: var(--calc-radius-md);
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.disclaimer-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.results-disclaimer p {
    margin: 0;
    font-size: 0.95rem;
    color: #92400e;
    line-height: 1.6;
}

/* ========================================
   LOADER
======================================== */
.calc-loader-advanced {
    padding: 60px 30px;
    text-align: center;
}

.calc-loader-advanced.hidden {
    display: none;
}

.loader-spinner-advanced {
    width: 60px;
    height: 60px;
    margin: 0 auto 25px;
    border: 5px solid var(--calc-neutral-200);
    border-top-color: var(--calc-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.calc-loader-advanced p {
    font-size: 1.1rem;
    color: var(--calc-neutral-600);
    font-weight: 600;
}

/* ========================================
   SCORE COLOR VARIATIONS
======================================== */
.score-number[data-score="5"] {
    color: var(--calc-score-5) !important;
    -webkit-text-fill-color: var(--calc-score-5) !important;
}

.score-number[data-score="4"] {
    color: var(--calc-score-4) !important;
    -webkit-text-fill-color: var(--calc-score-4) !important;
}

.score-number[data-score="3"] {
    color: var(--calc-score-3) !important;
    -webkit-text-fill-color: var(--calc-score-3) !important;
}

.score-number[data-score="2"] {
    color: var(--calc-score-2) !important;
    -webkit-text-fill-color: var(--calc-score-2) !important;
}

.score-number[data-score="1"] {
    color: var(--calc-score-1) !important;
    -webkit-text-fill-color: var(--calc-score-1) !important;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
    .ap-calculator-advanced {
        margin: 30px auto;
        padding: 0 15px;
    }
    
    .calc-header-advanced {
        padding: 30px 20px;
    }
    
    .calc-title-advanced {
        font-size: 1.8rem;
    }
    
    .curve-selector-section,
    .calc-form-advanced,
    .calc-results-advanced {
        padding: 25px 20px;
    }
    
    .curve-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-main-grid {
        grid-template-columns: 1fr;
    }
    
    .score-number {
        font-size: 4rem;
    }
    
    .essay-scores {
        grid-template-columns: 1fr;
    }
    
    .score-range-info {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .calc-title-advanced {
        font-size: 1.5rem;
    }
    
    .header-icon {
        font-size: 2.5rem;
    }
    
    .score-number {
        font-size: 3.5rem;
    }
    
    .curve-options {
        grid-template-columns: 1fr;
    }
    
    .calc-button-advanced {
        font-size: 1.1rem;
        padding: 16px 25px;
    }
}

/* ========================================
   ACCESSIBILITY
======================================== */
.calc-input-advanced:focus-visible,
.calc-button-advanced:focus-visible,
.curve-radio input:focus-visible + .radio-label {
    outline: 3px solid var(--calc-primary);
    outline-offset: 3px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print styles */
@media print {
    .calc-form-advanced,
    .curve-selector-section,
    .calc-button-advanced {
        display: none;
    }
    
    .calc-results-advanced {
        display: block !important;
    }
}