/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-from: #F0F3F7; /* Light gray-blue */
    --bg-to: #E6EAF0;   /* Slightly darker gray-blue */
    --primary-from: #2B66B4; /* Deep Blue from atcs.lk */
    --primary-to: #012658;   /* Darker Blue from atcs.lk */
    --secondary-from: #1BCB4A; /* Green from atcs.lk */
    --secondary-to: #0C4539;   /* Darker Green from atcs.lk */
    --accent-from: #FF652D;   /* Orange from atcs.lk */
    --accent-to: #CC5224;     /* Darker Orange */

    --text-primary: #121212;
    --text-secondary: #33373D;
    --text-muted: #828588;
    --border-color: #D1D5DB;
    --card-bg: #FFFFFF;
    --input-bg: #F9FAFB;
    --input-border: #E5E7EB;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

body.dark {
    --bg-from: #1A202C;
    --bg-to: #2D3748;
    --primary-from: #3B82F6;
    --primary-to: #2563EB;
    --secondary-from: #10B981;
    --secondary-to: #059669;
    --accent-from: #F59E0B;
    --accent-to: #D97706;

    --text-primary: #E2E8F0;
    --text-secondary: #A0AEC0;
    --text-muted: #718096;
    --border-color: #4A5568;
    --card-bg: #2D3748;
    --input-bg: #1A202C;
    --input-border: #4A5568;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

body.theme-blue {
    --primary-from: #2B66B4;
    --primary-to: #012658;
    --secondary-from: #1BCB4A;
    --secondary-to: #0C4539;
    --accent-from: #FF652D;
    --accent-to: #CC5224;
}

body.theme-purple {
    --primary-from: #9333EA;
    --primary-to: #7C3AED;
    --secondary-from: #EC4899;
    --secondary-to: #DB2777;
    --accent-from: #F59E0B;
    --accent-to: #D97706;
}

body.theme-green {
    --primary-from: #16A34A;
    --primary-to: #15803D;
    --secondary-from: #14B8A6;
    --secondary-to: #0D9488;
    --accent-from: #EAB308;
    --accent-to: #CA8A04;
}

body.theme-red {
    --primary-from: #DC2626;
    --primary-to: #B91C1C;
    --secondary-from: #F43F5E;
    --secondary-to: #E11D48;
    --accent-from: #F59E0B;
    --accent-to: #D97706;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    background: linear-gradient(135deg, var(--bg-from), var(--bg-to));
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 40px var(--shadow-color), 0 0 0 1px rgba(255, 255, 255, 0.1);
    padding: 40px;
    max-width: 1000px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
}

@media (min-width: 768px) {
    .container {
        grid-template-columns: 1fr 1fr;
    }
}

h1 {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-from), var(--primary-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
    text-align: center;
    grid-column: 1 / -1;
    letter-spacing: -0.02em;
}

.subheading {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-from);
    text-align: center;
    grid-column: 1 / -1;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    grid-column: 1 / -1;
    font-size: 1.1rem;
    line-height: 1.6;
}

.settings-bar {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, var(--input-bg), rgba(255, 255, 255, 0.8));
    border-radius: 12px;
    border: 1px solid var(--input-border);
    backdrop-filter: blur(10px);
}

.setting-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.setting-item label {
    cursor: pointer;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.4s;
    border-radius: 26px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
    background: linear-gradient(135deg, var(--primary-from), var(--primary-to));
}

input:checked + .slider:before {
    transform: translateX(18px);
}

select {
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

select:focus {
    outline: none;
    border-color: var(--primary-from);
    box-shadow: 0 0 0 3px rgba(43, 102, 180, 0.1);
}

.calculator-section, .results-section {
    background: linear-gradient(135deg, var(--input-bg), rgba(255, 255, 255, 0.9));
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--input-border);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.calculator-section:hover, .results-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-to);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title i {
    color: var(--primary-from);
    font-size: 1.4rem;
}

.button-group {
    display: flex;
    margin-bottom: 25px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--input-border);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.button-group button {
    flex: 1;
    padding: 14px 18px;
    border: none;
    background-color: var(--input-bg);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.button-group button:hover {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

.button-group button.active {
    background: linear-gradient(135deg, var(--primary-from), var(--primary-to));
    color: white;
    font-weight: 700;
    transform: scale(1.02);
    box-shadow: 0 6px 12px rgba(43, 102, 180, 0.3);
    border-color: var(--primary-from);
}

.button-group button.active.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-from), var(--secondary-to));
    box-shadow: 0 6px 12px rgba(27, 203, 74, 0.3);
}

.button-group button.active.btn-accent {
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    box-shadow: 0 6px 12px rgba(255, 101, 45, 0.3);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1.05rem;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 16px;
    border-radius: 10px;
    border: 2px solid var(--input-border);
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-from);
    box-shadow: 0 0 0 4px rgba(43, 102, 180, 0.1), 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.calculate-btn {
    width: 100%;
    padding: 18px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-from), var(--primary-to));
    color: white;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 16px rgba(43, 102, 180, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calculate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(43, 102, 180, 0.4);
}

.calculate-btn:active {
    transform: translateY(-1px);
}

.calculate-btn:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.results-display {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 768px) {
    .results-display {
        grid-template-columns: repeat(3, 1fr);
    }
}

.result-card {
    background: linear-gradient(135deg, var(--card-bg), rgba(255, 255, 255, 0.95));
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--input-border);
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.05);
}

.result-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.result-card .label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-card .value {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--primary-from);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.result-card .sub-value {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.breakdown-section {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--input-bg), rgba(255, 255, 255, 0.9));
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--input-border);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.breakdown-tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--input-border);
    gap: 5px;
}

.breakdown-tabs button {
    padding: 12px 20px;
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    border-radius: 8px 8px 0 0;
}

.breakdown-tabs button:hover {
    color: var(--primary-from);
    background-color: rgba(43, 102, 180, 0.05);
}

.breakdown-tabs button.active {
    color: var(--primary-from);
    font-weight: 700;
    border-color: var(--primary-from);
    background-color: rgba(43, 102, 180, 0.1);
}

.breakdown-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.breakdown-item {
    padding: 20px;
    border-radius: 10px;
    border: 1px solid var(--input-border);
    background: linear-gradient(135deg, var(--card-bg), rgba(255, 255, 255, 0.95));
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.breakdown-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(43, 102, 180, 0.1);
}

.breakdown-item .range {
    font-weight: 700;
    color: var(--primary-to);
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.breakdown-item .rate {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.breakdown-item .tax-amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary-from);
    margin-top: 12px;
}

.summary-section {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--input-bg), rgba(255, 255, 255, 0.9));
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--input-border);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    text-align: center;
}

.summary-item .label {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-item .value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-from);
    letter-spacing: -0.02em;
}

.comparison-section {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--input-bg), rgba(255, 255, 255, 0.9));
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--input-border);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 768px) {
    .comparison-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.comparison-item {
    background: linear-gradient(135deg, var(--card-bg), rgba(255, 255, 255, 0.95));
    border-radius: 10px;
    padding: 25px;
    border: 1px solid var(--input-border);
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.comparison-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.comparison-item .title {
    font-weight: 700;
    color: var(--primary-to);
    margin-bottom: 12px;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-item .value {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.comparison-item .value.positive {
    color: var(--secondary-from);
}

.comparison-item .value.negative {
    color: var(--accent-from);
}

/* Loading Overlay Styles */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.loading-content {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--input-border);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-from);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.loading-content p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

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

.hidden {
    display: none !important;
}

.no-animations * {
    transition: none !important;
}

/* Animation classes */
.animate-fadeIn {
    animation: fadeIn 0.6s ease-out;
}

.animate-slideIn {
    animation: slideIn 0.6s ease-out;
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility classes for icons */
.icon-sun, .icon-moon, .icon-palette, .icon-dollar-sign, .icon-settings, .icon-calculator, .icon-list, .icon-chart-bar, .icon-file-export, .icon-arrows-alt-h, .icon-info-circle, .icon-trending-up {
    display: inline-block;
    width: 1em;
    height: 1em;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: contain;
}

.icon-sun { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='4'%3E%3C/circle%3E%3Cpath d='M12 2v2'%3E%3C/path%3E%3Cpath d='M12 20v2'%3E%3C/path%3E%3Cpath d='M4.93 4.93l1.41 1.41'%3E%3C/path%3E%3Cpath d='M17.66 17.66l1.41 1.41'%3E%3C/path%3E%3Cpath d='M2 12h2'%3E%3C/path%3E%3Cpath d='M20 12h2'%3E%3C/path%3E%3Cpath d='M4.93 19.07l1.41-1.41'%3E%3C/path%3E%3Cpath d='M17.66 6.34l1.41-1.41'%3E%3C/path%3E%3C/svg%3E"); }
.icon-moon { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3a6 6 0 0 0 9 9 9 9 0 1 1-9-9Z'%3E%3C/path%3E%3C/svg%3E"); }
.icon-palette { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3a6 6 0 0 0 9 9 9 9 0 1 1-9-9Z'%3E%3C/path%3E%3C/svg%3E"); }
.icon-dollar-sign { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 1v22'%3E%3C/path%3E%3Cpath d='M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6'%3E%3C/path%3E%3C/svg%3E"); }
.icon-settings { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12.22 2h-.44a2 2 0 0 0-2 2v.18a2 2 0 0 1-1 1.73l-.43.25a2 2 0 0 1-2 0l-.15-.08a2 2 0 0 0-2.73.73l-.22.38a2 2 0 0 0 .73 2.73l.15.08a2 2 0 0 1 1 1.74v.44a2 2 0 0 1-1 1.73l-.15.08a2 2 0 0 0-.73 2.73l.22.38a2 2 0 0 0 2.73.73l.15-.08a2 2 0 0 1 2 0l.43.25a2 2 0 0 1 1 1.73V22a2 2 0 0 0 2 2h.44a2 2 0 0 0 2-2v-.18a2 2 0 0 1 1-1.73l.43-.25a2 2 0 0 1 2 0l.15.08a2 2 0 0 0 2.73-.73l.22-.38a2 2 0 0 0-.73-2.73l-.15-.08a2 2 0 0 1-1-1.74v-.44a2 2 0 0 1 1-1.73l.15-.08a2 2 0 0 0 .73-2.73l-.22-.38a2 2 0 0 0-2.73-.73l-.15.08a2 2 0 0 1-2 0l-.43-.25a2 2 0 0 1-1-1.73V2a2 2 0 0 0-2-2z'%3E%3C/path%3E%3Ccircle cx='12' cy='12' r='3'%3E%3C/circle%3E%3C/svg%3E"); }
.icon-calculator { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'%3E%3C/rect%3E%3Cpath d='M8.5 20V4'%3E%3C/path%3E%3Cpath d='M15.5 20V4'%3E%3C/path%3E%3Cpath d='M2 10h20'%3E%3C/path%3E%3Cpath d='M2 14h20'%3E%3C/path%3E%3C/svg%3E"); }
.icon-list { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 6h13'%3E%3C/path%3E%3Cpath d='M8 12h13'%3E%3C/path%3E%3Cpath d='M8 18h13'%3E%3C/path%3E%3Cpath d='M3 6h.01'%3E%3C/path%3E%3Cpath d='M3 12h.01'%3E%3C/path%3E%3Cpath d='M3 18h.01'%3E%3C/path%3E%3C/svg%3E"); }
.icon-chart-bar { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 20V10'%3E%3C/path%3E%3Cpath d='M18 20V4'%3E%3C/path%3E%3Cpath d='M6 20v-4'%3E%3C/path%3E%3Cpath d='M2 20h20'%3E%3C/path%3E%3C/svg%3E"); }
.icon-file-export { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'%3E%3C/path%3E%3Cpath d='M14 2v6h6'%3E%3C/path%3E%3Cpath d='M12 17v-6'%3E%3C/path%3E%3Cpath d='M8 13l4-4 4 4'%3E%3C/path%3E%3C/svg%3E"); }
.icon-arrows-alt-h { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M17 12H3'%3E%3C/path%3E%3Cpath d='M10 19l-7-7 7-7'%3E%3C/path%3E%3Cpath d='M21 5v14'%3E%3C/path%3E%3C/svg%3E"); }
.icon-info-circle { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cpath d='M12 16v-4'%3E%3C/path%3E%3Cpath d='M12 8h.01'%3E%3C/path%3E%3C/svg%3E"); }
.icon-trending-up { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='23 6 13.5 15.5 8.5 10.5 1 18'%3E%3C/polyline%3E%3Cpolyline points='17 6 23 6 23 12'%3E%3C/polyline%3E%3C/svg%3E"); }

/* Responsive Design Improvements */
@media (max-width: 768px) {
    .container {
        padding: 25px;
        margin: 10px;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .subheading {
        font-size: 1rem;
    }
    
    .settings-bar {
        gap: 15px;
        padding: 15px;
    }
    
    .button-group button {
        padding: 12px 14px;
        font-size: 0.9rem;
    }
    
    .form-group input[type="text"] {
        padding: 14px;
        font-size: 1.1rem;
    }
    
    .calculate-btn {
        padding: 16px;
        font-size: 1.1rem;
    }
    
    .result-card .value {
        font-size: 2rem;
    }
    
    .breakdown-content {
        grid-template-columns: 1fr;
    }
}