@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";

:root {
    --bg-color: #18181b;
    --card-bg: #27272a;
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --accent-color: #ff6600;
    --accent-hover: #ffb84d;
    --border-color: #3f3f46;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --font-family: "Outfit", sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
    overflow-y: auto;
    position: relative;
}

.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: .4;
    animation: float 20s infinite ease-in-out;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #4f46e5, #0000);
    animation-delay: 0s;
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #c026d3, #0000);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #06b6d4, #0000);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    to {
        transform: translate(0);
    }

    33% {
        transform: translate(30px, -50px);
    }

    66% {
        transform: translate(-20px, 20px);
    }
}

.page-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    z-index: 1;
}

.external-header {
    text-align: center;
    position: relative;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: .5rem;
}

.header-icon {
    font-size: 2.5rem;
    background: linear-gradient(to right, var(--accent-color), #ffb84d);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.external-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), #ffb84d);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

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

.app-container {
    width: 100%;
    background-color: var(--card-bg);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px #00000080;
    border: 1px solid var(--border-color);
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Converter Styles */
.category-selector {
    margin-bottom: 2rem;
}

.category-selector label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.category-selector select {
    width: 100%;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

.category-selector select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.conversion-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.5rem;
    align-items: end;
    margin-bottom: 2rem;
}

.conversion-box label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input {
    flex: 1;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1.1rem;
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.input-group select {
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    cursor: pointer;
    min-width: 120px;
}

.input-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.swap-btn-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-btn {
    width: 48px;
    height: 48px;
    background: var(--accent-color);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-btn:hover {
    background: var(--accent-hover);
    transform: rotate(180deg);
}

.result-display {
    padding: 1.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.result-text {
    color: var(--accent-color);
    font-size: 1.1rem;
    font-weight: 600;
}

/* Calculator Styles */
.calculator-section {
    max-width: 320px;
    margin: 0 auto;
}

.calculator-display {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 0.5rem;
}

.display-history {
    color: var(--text-secondary);
    font-size: 1rem;
    text-align: right;
    min-height: 1.5rem;
}

.display-current {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 600;
    text-align: right;
    word-break: break-all;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.calc-btn {
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1.25rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.calc-btn:hover {
    background: #3f3f46;
    transform: translateY(-2px);
}

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

.calc-btn.function {
    background: #3f3f46;
    color: var(--accent-color);
}

.calc-btn.operator {
    background: var(--accent-color);
    color: white;
}

.calc-btn.equals {
    background: var(--success-color);
    color: white;
}

.calc-btn.span-2 {
    grid-column: span 2;
}

/* Back to Home Button */
.back-home-btn {
    position: fixed;
    top: 24px;
    left: 24px;
    padding: 12px 24px;
    background: rgba(255, 102, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 102, 0, 0.3);
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--accent-color);
    text-decoration: none;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.back-home-btn:hover {
    background: rgba(255, 102, 0, 0.2);
    border-color: rgba(255, 102, 0, 0.6);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 20px rgba(255, 102, 0, 0.3);
}

.back-home-btn svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-color);
}

/* Responsive */
@media (max-width: 768px) {
    .page-container {
        padding: 1rem;
        padding-top: 4rem;
        width: 100%;
        overflow-x: hidden;
    }

    .back-home-btn {
        top: 10px;
        left: 10px;
        padding: 8px 16px;
        font-size: 0.9rem;
        z-index: 100;
    }

    .app-container {
        padding: 1rem;
        width: 100%;
    }

    .conversion-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        width: 100%;
    }

    .input-group {
        flex-direction: column;
        width: 100%;
    }

    .input-group input,
    .input-group select {
        width: 100%;
        box-sizing: border-box;
    }

    .swap-btn-container {
        order: 3;
    }

    .swap-btn {
        transform: rotate(90deg);
    }

    .swap-btn:hover {
        transform: rotate(270deg);
    }

    .calculator-section {
        max-width: 100%;
        width: 100%;
    }

    .calc-btn {
        padding: 0.875rem;
        font-size: 1.125rem;
    }

    .display-current {
        font-size: 1.75rem;
        word-wrap: break-word;
        /* Prevent long numbers from overflowing */
    }
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.external-header {
    animation: fadeInDown 1s ease-out;
}

.app-container {
    animation: fadeInUp 1s ease-out 0.2s backwards;
}