/* Minimal Black & White Theme */

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #333333;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border: #e0e0e0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--white);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.navbar {
    border-bottom: 1px solid var(--border);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
}

.dropdown-menu-dark {
    background-color: var(--black);
    border: 1px solid var(--border);
    border-radius: 0;
}

.dropdown-item {
    color: var(--white);
    padding: 0.5rem 1rem;
    transition: all 0.2s;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--white);
    color: var(--black);
}

.dropdown-item.active {
    background-color: var(--white);
    color: var(--black);
    font-weight: 600;
}

.nav-link.dropdown-toggle.active {
    color: var(--white);
    font-weight: 600;
}

.nav-link.active {
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 3rem 0;
    background-color: var(--white);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--black);
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.hero-subtitle {
    font-size: 1rem;
    margin-top: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 2rem;
    transition: all 0.2s ease;
    text-align: center;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-card:hover {
    border-color: var(--black);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tool-icon svg {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
}

.tool-icon i[data-feather] {
    display: inline-block;
}

.tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--black);
    font-weight: 600;
}

.tool-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
    flex-grow: 1;
}

.tool-card .btn {
    margin-top: auto;
    margin-top: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid var(--black);
    cursor: pointer;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.btn-primary:hover {
    background: var(--white);
    color: var(--black);
    border-color: var(--black);
}

/* Tool Page */
.tool-page {
    max-width: 800px;
    margin: 0 auto;
}

.tool-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.tool-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--black);
    letter-spacing: -0.02em;
}

.tool-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Converter Container */
.converter-container {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 2.5rem;
}

.converter-box {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.input-group label,
.select-wrapper label,
.result-group label {
    font-weight: 600;
    color: var(--black);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0;
    font-size: 1.1rem;
    transition: border-color 0.2s;
    background: var(--white);
    color: var(--black);
}

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

.select-group {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: end;
}

.select-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.select-wrapper select {
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0;
    font-size: 1rem;
    background: var(--white);
    color: var(--black);
    cursor: pointer;
    transition: border-color 0.2s;
}

.select-wrapper select:focus {
    outline: none;
    border-color: var(--black);
}

.swap-btn {
    background: var(--black);
    color: var(--white);
    border: 1px solid var(--black);
    border-radius: 0;
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
    align-self: end;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.swap-btn:hover {
    background: var(--white);
    color: var(--black);
}

.swap-btn svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.result-display {
    background: var(--gray-light);
    padding: 1.5rem;
    border-radius: 0;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
    text-align: center;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}


/* Ads Container */
.ads-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
    text-align: center;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .select-group {
        grid-template-columns: 1fr;
    }

    .swap-btn {
        align-self: center;
        margin: 0.5rem 0;
    }

    .converter-container {
        padding: 1.5rem;
    }

    .tool-header h1 {
        font-size: 2rem;
    }
}

/* Breadcrumbs */
.breadcrumb-nav {
    margin-top: 1rem;
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    padding: 0 0.5rem;
    color: var(--text-secondary);
}

.breadcrumb-item a {
    color: var(--black);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-secondary);
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.error-message {
    background: var(--gray-light);
    color: var(--black);
    padding: 1rem;
    border-radius: 0;
    margin-top: 1rem;
    display: none;
    border: 1px solid var(--border);
}

.error-message.show {
    display: block;
}

/* Bootstrap overrides for minimal theme */
.navbar-dark {
    background-color: var(--black) !important;
}

.bg-dark {
    background-color: var(--black) !important;
}

.text-white {
    color: var(--white) !important;
}