:root {
    --bg: #0b1220;
    --surface: rgba(255, 255, 255, 0.06);
    --surface-strong: rgba(255, 255, 255, 0.1);
    --text: #e2e8f0;
    --text-strong: #ffffff;
    --muted: #94a3b8;
    --primary: #5c7cfa;
    --primary-strong: #7c5cff;
    --primary-text: #ffffff;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 30px 80px rgba(0, 0, 0, 0.24);
    --max-width: 1200px;
    --white: #fff;
    --black: #000;
    --white-04: rgba(255, 255, 255, 0.04);
    --white-05: rgba(255, 255, 255, 0.05);
    --white-06: rgba(255, 255, 255, 0.06);
    --white-08: rgba(255, 255, 255, 0.08);
    --white-10: rgba(255, 255, 255, 0.1);
    --white-12: rgba(255, 255, 255, 0.12);
    --white-14: rgba(255, 255, 255, 0.14);
    --white-55: rgba(255, 255, 255, 0.55);
    --black-25: rgba(0, 0, 0, 0.25);
    --black-12: rgba(0, 0, 0, 0.12);
    --body-bg: radial-gradient(circle at top, rgba(92, 124, 250, 0.18), transparent 26%), linear-gradient(180deg, #060b18 0%, #0e1727 100%);
    --h1-gradient: linear-gradient(to bottom right, #fff 40%, rgba(255,255,255,0.6));
    
    /* Fluid Font Sizes */
    --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
    --fs-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --fs-base: clamp(1rem, 0.95rem + 0.4vw, 1.125rem);
    --fs-lg: clamp(1.125rem, 1.05rem + 0.5vw, 1.35rem);
    --fs-xl: clamp(1.5rem, 1.4rem + 1vw, 2.25rem);
    --fs-xxl: clamp(2.25rem, 2rem + 4vw, 4.5rem);
}

[data-theme="light"] {
    --bg: #f8fafc;
    --surface: rgba(0,0,0,0.03);
    --surface-strong: rgba(0,0,0,0.06);
    --text: #334155;
    --text-strong: #0f172a;
    --muted: #64748b;
    --primary: #4f46e5;
    --primary-strong: #4338ca;
    --primary-text: #ffffff;
    --border: rgba(0,0,0,0.1);
    --shadow: 0 30px 80px rgba(0, 0, 0, 0.08);
    --white: #0f172a;
    --black: #ffffff;
    --white-04: rgba(0, 0, 0, 0.03);
    --white-05: rgba(0, 0, 0, 0.04);
    --white-06: rgba(0, 0, 0, 0.05);
    --white-08: rgba(0, 0, 0, 0.08);
    --white-10: rgba(0, 0, 0, 0.1);
    --white-12: rgba(0, 0, 0, 0.12);
    --white-14: rgba(0, 0, 0, 0.14);
    --white-55: rgba(0, 0, 0, 0.55);
    --black-25: rgba(255, 255, 255, 0.5);
    --black-12: rgba(255, 255, 255, 0.5);
    --body-bg: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    --h1-gradient: linear-gradient(to bottom right, #0f172a 40%, rgba(15, 23, 42, 0.6));
}

* {
    box-sizing: border-box;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--body-bg);
    overflow-x: hidden;
    width: 100%;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: #7c5cff;
    text-decoration: none;
    transition: color 0.2s ease;
}
a:visited {
    color: #b085ff;
}
a:hover,
a:focus {
    color: var(--white);
}
a[href^="http"] {
    color: #38bdf8;
}
a[href^="http"]:visited {
    color: #7dd3fc;
}
a[href^="http"]:hover,
a[href^="http"]:focus {
    color: #a5f3fc;
}

button,
input {
    font: inherit;
}

button,
.btn {
    border: none;
    cursor: pointer;
}

button:focus,
input:focus,
a:focus {
    outline: 3px solid rgba(92, 124, 250, 0.35);
    outline-offset: 3px;
}

.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-header {
    padding: 1.5rem 1rem 2rem;
}

.topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.brand {
    font-size: var(--fs-lg);
    font-weight: 850;
    letter-spacing: -0.04em;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand::after {
    content: '';
    display: inline-block;
    width: 0.9em;
    height: 0.9em;
    border-radius: 0.3em;
    background: linear-gradient(135deg, #5c7cfa, #fb7185);
    box-shadow: 0 0 20px rgba(92, 124, 250, 0.45);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    background: var(--white-06);
    border: 1px solid var(--white-10);
    padding: 0.75rem;
    border-radius: 12px;
    cursor: pointer;
    z-index: 1001;
    min-width: auto;
    transition: all 0.2s ease;
}

.mobile-toggle:hover {
    background: var(--white-10);
}

.hamburger-box {
    width: 24px;
    height: 18px;
    display: block;
    position: relative;
}

.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
    width: 24px;
    height: 2px;
    background-color: var(--white);
    position: absolute;
    transition: transform 0.15s ease, opacity 0.15s ease;
    border-radius: 4px;
}

.hamburger-inner {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger-inner::before {
    content: "";
    top: -8px;
}

.hamburger-inner::after {
    content: "";
    bottom: -8px;
}

.mobile-toggle.active .hamburger-inner {
    background-color: transparent;
}

.mobile-toggle.active .hamburger-inner::before {
    transform: translateY(8px) rotate(45deg);
}

.mobile-toggle.active .hamburger-inner::after {
    transform: translateY(-8px) rotate(-45deg);
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1.15rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--muted);
    transition: color 0.2s ease;
}

nav a:hover,
nav a:focus {
    color: var(--white);
}

.hero {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    align-items: center;
    max-width: 100%;
    width: 100%;
    margin: 2rem auto 0;
}

.hero > * {
    min-width: 0;
}

.hero-copy {
    padding: 2.5rem 0;
}

.eyebrow {
    display: inline-flex;
    padding: 0.55rem 0.95rem;
    border-radius: 999px;
    background: rgba(92, 124, 250, 0.15);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.84rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero-copy h1 {
    font-size: var(--fs-xxl);
    font-weight: 850;
    line-height: 0.95;
    margin: 0 0 1.5rem;
    max-width: 15ch;
    letter-spacing: -0.04em;
    background: var(--h1-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-copy p {
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 55ch;
    color: var(--muted);
    margin: 0 0 1.75rem;
}

.cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3rem;
    padding: 0 1.5rem;
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #5c7cfa, #8b5cf6);
    color: var(--primary-text);
    box-shadow: 0 16px 40px rgba(92, 124, 250, 0.22);
}

.btn-primary:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #435ef2, #7c65ff);
}

.btn-secondary {
    background: var(--white-08);
    color: var(--text);
}

.btn-secondary:hover {
    transform: translateY(-1px);
    background: var(--white-14);
}

.card {
    background: var(--white-06);
    border: 1px solid var(--white-10);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.hero-panel {
    padding: 2rem;
}

.panel-header p {
    margin: 0;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.82rem;
}

.panel-header h2 {
    margin: 0.5rem 0 1.5rem;
    font-size: 1.8rem;
    line-height: 1.1;
}

.form-grid {
    display: grid;
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: var(--text);
}

input[type="number"] {
    width: 100%;
    padding: 1rem 1.1rem;
    border-radius: 16px;
    border: 1px solid var(--white-12);
    background: var(--white-06);
    color: var(--white);
}

input[type="number"]::placeholder {
    color: var(--white-55);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

button {
    min-width: 160px;
    background: #5c7cfa;
    color: var(--white);
    border-radius: 999px;
    padding: 0.95rem 1.25rem;
    transition: transform 0.2s ease, background 0.2s ease;
}

button:hover {
    background: #4668e5;
    transform: translateY(-1px);
}

button[type="reset"] {
    background: var(--white-08);
    color: var(--text);
}

button[type="reset"]:hover {
    background: var(--white-14);
}

.result-panel {
    margin-top: 1.75rem;
    padding: 1.25rem 1.4rem;
    border-radius: 20px;
    background: var(--white-06);
    border: 1px solid var(--white-08);
    color: var(--white);
    font-size: 1.05rem;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-main {
    max-width: 100%;
    width: 100%;
    margin: 3rem auto 2rem;
    padding: 0 1rem;
    display: grid;
    gap: 2.5rem;
}

.page-main > * {
    min-width: 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}

.feature-card {
    padding: 1.75rem;
    border-radius: 24px;
    background: var(--white-05);
    border: 1px solid var(--white-08);
}

.feature-card h3 {
    margin-top: 0;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--muted);
    margin: 0.85rem 0 0;
    line-height: 1.75;
}

.section-panel {
    padding: 2rem;
    border-radius: 28px;
    background: var(--white-04);
    border: 1px solid var(--white-08);
}

.section-panel h2 {
    margin-top: 0;
    color: var(--white);
}

.section-panel p,
.section-panel li,
.section-panel table,
.section-panel details p {
    color: var(--muted);
}

.section-panel ul {
    padding-left: 1.25rem;
}

.section-panel li {
    margin-bottom: 0.65rem;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background: var(--white-04);
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
}

th,
td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--white-08);
    text-align: left;
}

th {
    color: var(--white);
    font-weight: 600;
    background: var(--white-05);
}

tbody tr:hover {
    background: var(--white-05);
}

details {
    background: var(--white-04);
    border: 1px solid var(--white-08);
    border-radius: 18px;
    padding: 1rem;
    margin-top: 1rem;
}

summary {
    font-weight: 600;
    cursor: pointer;
}

details p {
    margin: 0.75rem 0 0;
}

.site-footer {
    padding: 2rem 1rem;
    background: var(--black-25);
    border-top: 1px solid var(--white-08);
}

.site-footer nav ul {
    justify-content: center;
}

.site-footer p {
    margin: 1rem 0 0;
    color: var(--muted);
    text-align: center;
}

body > nav,
.page-header nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.9rem 1rem 0.75rem;
    background: var(--white-05);
    border-bottom: 1px solid var(--white-08);
    border-radius: 0 0 24px 24px;
}

body > nav {
    display: flex;
    justify-content: center;
}

body > nav ul,
.page-header nav ul,
.topbar nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

body > nav a,
.page-header nav a,
.topbar nav a {
    display: inline-block;
    color: var(--muted);
    font-weight: 600;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

body > nav a:hover,
.page-header nav a:hover,
.topbar nav a:hover,
body > nav a:focus,
.page-header nav a:focus,
.topbar nav a:focus {
    color: var(--white);
    background: var(--white-08);
}

header {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1rem 2rem;
}

header h1,
header h2 {
    color: var(--white);
    margin: 0 0 0.8rem;
}

header p,
main p,
main li,
main td,
main th,
main details p {
    color: var(--muted);
}

main {
    max-width: 100%;
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem 2rem;
    display: grid;
    gap: 2rem;
}

main > * {
    min-width: 0;
}

main section {
    background: var(--white-04);
    border: 1px solid var(--white-08);
    border-radius: 24px;
    padding: 1.75rem;
    box-shadow: 0 20px 50px var(--black-12);
}

main section h2,
main section h3 {
    color: var(--white);
}

main section ul {
    padding-left: 1.2rem;
}

main section ul li {
    margin-bottom: 0.75rem;
    line-height: 1.75;
}

footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 1rem 2rem;
}

footer p {
    color: var(--muted);
    text-align: center;
}

.tools-page #tools-list ul li a {
    color: #7c5cff;
    font-weight: 700;
}

.tools-page #tools-list ul li a:hover,
.tools-page #tools-list ul li a:focus {
    color: #5c7cfa;
}

.tools-page #tools-list h3 {
    margin-top: 1.75rem;
}

@media (max-width: 1024px) {
    :root {
        --max-width: 95%;
    }
    
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-copy {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-copy p {
        margin: 0 auto 2rem;
    }

    .cta-group {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: rgba(11, 18, 32, 0.95);
        backdrop-filter: blur(20px);
        border-left: 1px solid var(--white-10);
        padding: 6rem 2rem 2rem;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        display: block;
    }

    nav.active {
        right: 0;
        box-shadow: -20px 0 50px rgba(0,0,0,0.5);
    }

    nav ul {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
    }

    nav a {
        font-size: 1.25rem;
        width: 100%;
        padding: 0.5rem 0;
    }

    .theme-btn {
        width: 100%;
        margin-top: 2rem;
        background: var(--surface-strong);
        border: 1px solid var(--border);
        color: var(--text);
        font-weight: 600;
        padding: 0.75rem 1.25rem;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
    }

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

    .hero-panel {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .page-main {
        padding: 0 0.5rem;
    }

    .site-header {
        padding: 1rem 0.5rem;
    }

    .hero-copy h1 {
        letter-spacing: -0.02em;
    }

    .cta-group .btn {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions button {
        width: 100%;
        min-width: unset;
    }

    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 0.75rem 0.5rem;
    }
}