/* CSS Variables & Theming - Tynkr Glass Design System */
:root {
    --font-family: 'Inter', BlinkMacSystemFont, sans-serif;
}

html[data-theme="dark"] {
    --app-bg: #0c0813;
    --app-bg-gradient: radial-gradient(circle at 0% 0%, rgba(201,168,76,0.15) 0%, transparent 50%), radial-gradient(circle at 100% 100%, rgba(201,168,76,0.05) 0%, transparent 50%);
    --glass-bg: rgba(12, 8, 19, 0.65);
    --glass-border: rgba(201, 168, 76, 0.45);
    --text-main: #f7f4f2;
    --text-muted: rgba(247, 244, 242, 0.6);
    --primary-color: #c9a84c; 
    --primary-hover: #e0bc55;
    --input-bg: rgba(247, 244, 242, 0.05);
    --input-border: rgba(247, 244, 242, 0.2);
    --footer-text: rgba(247, 244, 242, 0.4);
}

html[data-theme="light"] {
    --app-bg: #f7f4f2;
    --app-bg-gradient: radial-gradient(circle at 0% 0%, rgba(216,80,10,0.1) 0%, transparent 50%), radial-gradient(circle at 100% 100%, rgba(216,80,10,0.05) 0%, transparent 50%);
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(255, 255, 255, 0.85);
    --text-main: #0c0813;
    --text-muted: rgba(12, 8, 19, 0.6);
    --primary-color: #d8500a;
    --primary-hover: #f05a0d;
    --input-bg: rgba(255, 255, 255, 0.7);
    --input-border: rgba(12, 8, 19, 0.1);
    --footer-text: rgba(12, 8, 19, 0.4);
}

html[data-theme="mist"] {
    --app-bg: #3f454c;
    --app-bg-gradient: radial-gradient(circle at 0% 0%, rgba(143,177,198,0.15) 0%, transparent 50%), radial-gradient(circle at 100% 100%, rgba(143,177,198,0.05) 0%, transparent 50%);
    --glass-bg: rgba(63, 69, 76, 0.55);
    --glass-border: rgba(232, 235, 237, 0.42);
    --text-main: #e8ebed;
    --text-muted: rgba(232, 235, 237, 0.7);
    --primary-color: #8fb1c6;
    --primary-hover: #a1c6dd;
    --input-bg: rgba(232, 235, 237, 0.05);
    --input-border: rgba(232, 235, 237, 0.2);
    --footer-text: rgba(232, 235, 237, 0.5);
}

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

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--app-bg);
    background-image: var(--app-bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
    position: relative;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

header p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.header-top {
    position: absolute;
    top: 0;
    right: 0;
}

.theme-toggle-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.calculator-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.controls-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.input-group label {
    font-weight: 600;
    font-size: 0.95rem;
}

.input-group input, .input-group select {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    padding: 0.8rem;
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.input-group input:focus, .input-group select:focus {
    border-color: var(--primary-color);
}

.input-group select option {
    background-color: var(--app-bg);
    color: var(--text-main);
}

/* Chrome, Safari, Edge, Opera hide spinners */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type=number] {
  -moz-appearance: textfield;
}

.primary-btn {
    background: var(--primary-color);
    color: #fff; /* High contrast */
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

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

.output-area h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.timeline-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.timeline-list li {
    display: flex;
    flex-direction: column;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    padding: 1rem;
    border-radius: 8px;
}

.timeline-list li.placeholder-text {
    align-items: center;
    color: var(--text-muted);
    font-style: italic;
    background: transparent;
    border: 1px dashed var(--glass-border);
}

.timeline-step {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.timeline-time {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.timeline-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

.action-btn {
    flex: 1;
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--text-main);
    padding: 0.8rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--primary-color);
    color: #fff;
}

/* Sidebar Styles */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: fit-content;
}

.sidebar h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.gear-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.gear-item {
    text-decoration: none;
    color: inherit;
    display: block;
    background: rgba(128, 128, 128, 0.05);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s ease, background 0.2s ease;
    border: 1px solid transparent;
}

.gear-item:hover {
    transform: translateY(-4px);
    background: rgba(128, 128, 128, 0.1);
    border-color: var(--glass-border);
}

.gear-img-wrapper {
    height: 160px;
    width: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.gear-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.gear-img-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
}

.gear-info {
    padding: 1rem;
}

.gear-info h3 {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 0.3rem;
}

.gear-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 1rem;
}

.affiliate-btn {
    background: var(--primary-color);
    color: #fff; /* High contrast */
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-weight: 700;
    font-family: var(--font-family);
    cursor: pointer;
    text-align: center;
    transition: background 0.2s ease;
    width: 100%;
}

.gear-item:hover .affiliate-btn {
    background: var(--primary-hover);
}

.disclaimer {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin: 1.5rem auto 0.5rem auto;
    max-width: 800px;
    opacity: 0.8;
}

footer {
    text-align: center;
    padding: 1rem;
    margin-top: 1rem;
}

footer p {
    font-size: 0.85rem;
    color: var(--footer-text);
}

/* Responsive */
@media (max-width: 960px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .header-top {
        position: relative;
        margin-bottom: 1rem;
        display: flex;
        justify-content: center;
    }
    
    header h1 {
        font-size: 2rem;
    }
}