:root {
    color-scheme: dark;

    /* Brand palette ----------------------------------------------------- */
    --green-primary: #00D084;
    --green-secondary: #10B981;
    --green-hover: #00A865;
    --green-light: #D1FAE5;

    --tw-green-primary: 0 208 132;
    --tw-green-secondary: 16 185 129;
    --tw-green-hover: 0 168 101;

    /* Greyscale --------------------------------------------------------- */
    --bg-primary: #0A0A0A;
    --bg-secondary: #1E1E1E;
    --bg-tertiary: #2A2A2A;
    --border-color: #3A3A3A;

    --text-primary: #FFFFFF;
    --text-secondary: #B3B3B3;
    --text-tertiary: #808080;

    /* Layout ------------------------------------------------------------ */
    --header-height: 64px;
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 72px;
    --transition-speed: 0.3s;
}

[data-theme="light"] {
    color-scheme: light;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #EEF2F6;
    --border-color: #E5E7EB;

    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
}

html,
body {
    min-height: 100%;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1A1A1A 100%);
    color: var(--text-primary);
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

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

.app-header {
    height: var(--header-height);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    gap: 1rem;
}

.app-header__group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--green-primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: width var(--transition-speed);
}

body[data-sidebar="collapsed"] .app-sidebar {
    width: var(--sidebar-width-collapsed);
}

.app-sidebar__toggle {
    display: flex;
    justify-content: flex-end;
}

.app-sidebar__nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.app-sidebar__nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-decoration: none;
    transition: background-color var(--transition-speed), color var(--transition-speed), transform var(--transition-speed);
}

.app-sidebar__nav a:hover,
.app-sidebar__nav a:focus {
    background-color: rgba(0, 208, 132, 0.1);
    color: var(--green-primary);
    transform: translateX(4px);
}

.app-sidebar__nav a.is-active {
    color: var(--green-primary);
    background: linear-gradient(135deg, rgba(0, 208, 132, 0.2), rgba(16, 185, 129, 0.15));
    border: 1px solid rgba(0, 208, 132, 0.3);
}

.app-body {
    display: flex;
    flex: 1;
    width: 100%;
}

.app-content {
    flex: 1;
    padding: 2rem 2.5rem;
    background-color: rgba(10, 10, 10, 0.75);
}

@media (max-width: 1024px) {
    .app-sidebar {
        display: none;
    }

    body[data-sidebar="open"] .app-sidebar {
        position: fixed;
        inset: 0;
        display: flex;
        z-index: 40;
        width: min(320px, 80vw);
        box-shadow: 0 32px 60px rgba(0, 0, 0, 0.5);
    }
}

.theme-toggle,
.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.theme-toggle:hover,
.lang-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 208, 132, 0.25);
    border-color: rgba(0, 208, 132, 0.6);
    color: var(--green-primary);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    background: rgba(0, 208, 132, 0.2);
    color: var(--green-primary);
}

.glass-panel {
    background: rgba(30, 30, 30, 0.9);
    border: 1px solid rgba(58, 58, 58, 0.9);
    border-radius: 1rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45), 0 0 32px rgba(0, 208, 132, 0.08);
    backdrop-filter: blur(18px);
}

[data-theme="light"] .glass-panel {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(229, 231, 235, 0.8);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.1);
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.form-field input,
.form-field select,
.form-field textarea {
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 0.75rem;
    padding: 0.875rem 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--green-primary);
    box-shadow: 0 0 0 3px rgba(0, 208, 132, 0.15);
    background: rgba(0, 208, 132, 0.06);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    background: linear-gradient(135deg, var(--green-primary), var(--green-secondary));
    color: #0A0A0A;
    padding: 0.95rem 1.5rem;
    border: none;
    border-radius: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    box-shadow: 0 14px 32px rgba(0, 208, 132, 0.35);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(0, 208, 132, 0.45);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.language-menu {
    position: relative;
}

.language-menu__dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 180px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    padding: 0.5rem;
    display: none;
    flex-direction: column;
}

.language-menu__dropdown button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    text-align: left;
    padding: 0.65rem 0.75rem;
    border-radius: 0.65rem;
    cursor: pointer;
}

.language-menu__dropdown button:hover {
    background: rgba(0, 208, 132, 0.12);
    color: var(--green-primary);
}

.language-menu.is-open .language-menu__dropdown {
    display: flex;
}