/* ==========================================================================
   Design Tokens & Variables — Vibrant Orange & Modern High School Theme
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700;800;900&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    /* Energetic & Vibrant Color Palette */
    --primary-orange: #FF6B35; /* Electric Sunset Orange */
    --primary-orange-hover: #E85520;
    --orange-glow: rgba(255, 107, 53, 0.25);
    --accent-amber: #FF9F1C; /* Bright Golden Amber */
    --accent-teal: #2EC4B6; /* Energetic Cyber Teal */
    --accent-teal-hover: #20A398;
    --accent-teal-light: #E6F8F6;
    --accent-indigo: #4361EE; /* Modern Indigo / Cobalt */
    /* Sleek Clean Surfaces */
    --bg-main: #F8FAFC; /* Cool Soft Porcelain */
    --bg-card: #FFFFFF; /* Crisp Pure White */
    --bg-card-hover: #FAFAFD;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --bg-footer: #0F172A; /* Sleek Obsidian Dark Slate */
    /* Typography — High-Energy Modern Sans-Serifs */
    --text-primary: #0F172A; /* Dark Slate Charcoal */
    --text-secondary: #475569; /* Medium Cool Gray */
    --text-muted: #94A3B8; /* Light Muted Gray */
    --font-heading: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    /* Elevation, Glowing Borders & Soft Shadows */
    --border-color: #E2E8F0;
    --border-strong: #CBD5E1;
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
    --shadow-lg: 0 20px 35px -10px rgba(255, 107, 53, 0.18);
    --shadow-orange: 0 8px 20px rgba(255, 107, 53, 0.35);
    /* Smooth Modern Rounded Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 9999px;
    --max-width: 1100px;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* Vibrant Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* ==========================================================================
   Layout & Containers
   ========================================================================== */
.container {
    max-width: 800px;
    margin: 0 auto;
}

.main-content {
    flex: 1;
    padding: 3.5rem 1.5rem;
}

.content-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.home-container {
    text-align: center;
    padding: 4rem 1rem;
}

.header {
    text-align: center;
}

    .header h2 {
        color: var(--text-primary);
        font-size: 2.25rem;
        font-weight: 800;
        margin-bottom: 2rem;
        position: relative;
        display: inline-block;
    }

        /* Energetic Gradient Accent Underline */
        .header h2::after {
            content: '';
            display: block;
            width: 60%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-orange), var(--accent-amber), var(--accent-teal));
            margin: 0.5rem auto 0;
            border-radius: var(--radius-pill);
        }

/* ==========================================================================
   Navigation Bar — Frosted Glass & Glowing Badges
   ========================================================================== */
.top-navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    white-space: nowrap;
    letter-spacing: -0.02em;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

    .nav-brand:hover {
        transform: scale(1.02);
    }

.brand-icon {
    font-size: 1.4rem;
    color: var(--primary-orange);
    display: inline-block;
    filter: drop-shadow(0 2px 4px var(--orange-glow));
}

.brand-text {
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--accent-amber) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1 1 auto;
    justify-content: flex-end;
    min-width: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-pill);
    transition: all 0.2s ease;
    display: inline-block;
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

    .nav-link:hover {
        color: var(--primary-orange);
        background-color: rgba(255, 107, 53, 0.08);
    }

/* Custom Language Dropdown */
.lang-dropdown {
    position: relative;
    display: inline-block;
    flex-shrink: 0;
}

.lang-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-pill);
    padding: 0.45rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

    .lang-dropdown-btn:hover {
        border-color: var(--primary-orange);
        box-shadow: 0 0 0 3px var(--orange-glow);
    }

.dropdown-chevron {
    transition: transform 0.2s ease;
}

.lang-dropdown.open .dropdown-chevron {
    transform: rotate(180deg);
}

.lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 1050;
    min-width: 160px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.lang-dropdown.open .lang-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}

    .lang-dropdown-item:hover {
        background: rgba(255, 107, 53, 0.08);
        color: var(--primary-orange);
    }

    .lang-dropdown-item.active {
        background: var(--primary-orange);
        color: #ffffff;
    }

.lang-code-badge {
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 6px;
    background: var(--bg-main);
    color: var(--text-primary);
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-color);
}

.lang-dropdown-item.active .lang-code-badge {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    border-color: transparent;
}

/* ==========================================================================
   Buttons & Controls — Energetic Orange & Cyber Teal
   ========================================================================== */
form.button-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 80%;
    max-width: 800px;
    margin: 20px auto;
}

.button-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
}

.submit-wrapper {
    display: flex;
    align-items: center;
}

/* Cyber Teal Submit Button */
.submit-button {
    background-color: var(--accent-teal);
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.9rem 2rem;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(46, 196, 182, 0.35);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

    .submit-button:hover {
        background-color: var(--accent-teal-hover);
        box-shadow: 0 6px 20px rgba(46, 196, 182, 0.45);
        transform: translateY(-2px);
    }

    .submit-button:active {
        transform: translateY(0);
        box-shadow: none;
    }

/* Electric Orange Practice Button */
.practice-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2.25rem;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--accent-amber) 100%);
    color: #ffffff;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    border-radius: var(--radius-pill);
    border: none;
    box-shadow: var(--shadow-orange);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

    .practice-btn:hover {
        transform: translateY(-3px) scale(1.02);
        box-shadow: 0 12px 28px rgba(255, 107, 53, 0.45);
    }

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

/* ==========================================================================
   Options & Groups
   ========================================================================== */
.options-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: stretch;
}

.options-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    background-color: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Verb Cards — Vibrant Sleek Cards with Hover Lift
   ========================================================================== */
.verb-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 850px;
    margin: 0 auto;
}

.verb-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 6px solid var(--primary-orange);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

    .verb-card:hover {
        border-left-color: var(--accent-amber);
        box-shadow: var(--shadow-lg);
        transform: translateY(-3px);
    }

.prompt-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1rem;
    position: relative;
}

/* Vibrant Orange Title Inscription Prompt */
.verb-prompt {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    cursor: help;
    text-decoration: underline dotted var(--primary-orange);
    text-underline-offset: 6px;
}

/* Bright Pill Badges */
.grammar-badge {
    background-color: rgba(255, 107, 53, 0.1);
    color: var(--primary-orange);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 107, 53, 0.2);
}

/* Interactive Word Styling */
.reform-word {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: help;
    text-decoration: underline dotted var(--text-muted);
    text-underline-offset: 4px;
    position: relative;
}

/* ==========================================================================
   Inputs & Dropdowns
   ========================================================================== */
.input-wrapper {
    flex-basis: 100%;
    position: relative;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
}

.practice-input {
    width: 100%;
    padding: 0.85rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--bg-main);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: all 0.2s ease;
}

    .practice-input:focus {
        background-color: var(--bg-card);
        border-color: var(--primary-orange);
        box-shadow: 0 0 0 4px var(--orange-glow);
    }

    /* Vibrant Cyber Teal Success State */
    .practice-input.correct,
    .comparative-input.correct {
        background-color: var(--accent-teal-light);
        border-color: var(--accent-teal);
        color: #0A5C54;
        font-weight: 700;
        box-shadow: 0 0 0 4px rgba(46, 196, 182, 0.2);
    }

.dropdown-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.85rem;
}

.gram-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-main);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .gram-select:focus {
        border-color: var(--primary-orange);
        background-color: var(--bg-card);
        box-shadow: 0 0 0 4px var(--orange-glow);
    }

    .gram-select.correct {
        background-color: var(--accent-teal-light);
        border-color: var(--accent-teal);
        color: #0A5C54;
        font-weight: 700;
        box-shadow: 0 0 0 4px rgba(46, 196, 182, 0.2);
    }

/* ==========================================================================
   Tooltips & Popups
   ========================================================================== */
.dictionary-hint {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    z-index: 20;
    background-color: var(--bg-footer);
    color: #FFFFFF;
    font-family: var(--font-sans);
    font-size: 0.825rem;
    font-weight: 600;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-orange);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-4px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

    .reform-word:hover + .dictionary-hint,
    .grammar-badge:hover + .dictionary-hint,
    .verb-prompt:hover + .dictionary-hint,
    .dictionary-hint:hover {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

/* ==========================================================================
   Banners & Feedback — High Contrast Alerts
   ========================================================================== */
.error-banner {
    background-color: #FFF2F2;
    border: 1.5px solid #FFC2C2;
    color: #D93838;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-top: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==========================================================================
   Footer — Dark Sleek Obsidian Base
   ========================================================================== */
.site-footer {
    background-color: var(--bg-footer);
    color: #94A3B8;
    padding: 3rem 1.5rem;
    font-size: 0.9rem;
    border-top: 4px solid var(--primary-orange);
    margin-top: auto;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-copyright {
    margin: 0;
    font-family: var(--font-heading);
    font-weight: 600;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-link {
    color: var(--primary-orange);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.2s ease;
}

    .footer-link:hover {
        color: var(--accent-amber);
        text-decoration: underline;
    }

/* ==========================================================================
   Responsive Design & Safe Mobile Navigation
   ========================================================================== */
@media (max-width: 900px) {
    .nav-container {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-menu {
        justify-content: space-between;
        width: 100%;
    }

    .nav-links {
        justify-content: flex-start;
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 0.25rem;
        -webkit-overflow-scrolling: touch;
    }

    .nav-link {
        font-size: 0.85rem;
        max-width: none;
    }
}

@media (max-width: 640px) {
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}
.footer-tools {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all 0.2s ease;
}

    .footer-btn:hover {
        background: var(--primary-orange);
        border-color: var(--primary-orange);
        transform: translateY(-1px);
    }

/* Make sure print buttons don't print on paper */
@media print {
    .nav-actions,
    .footer-tools {
        display: none !important;
    }
}

/* ==========================================================================
   Print & PDF Stylesheet — Clean Printable Worksheets
   ========================================================================== */

/* Page Setup for A4 / Letter */
@page {
    size: portrait;
    margin: 1.5cm;
}

@media print {
    /* 1. Hide UI, Navigation, Footers, and Form Option Panels */
    header,
    footer,
    .top-navbar,
    .site-footer,
    .options-container,
    .nav-actions,
    .footer-tools,
    .submit-wrapper,
    .error-banner,
    button {
        display: none !important;
    }

    /* 2. Reset Backgrounds & Page Dimensions */
    html, body, .main-content, .content-container {
        background: #ffffff !important;
        color: #000000 !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        box-shadow: none !important;
    }

    /* 3. Re-style Cards for Printable Layout */
    .verb-list, [class*="-list"] {
        display: block !important;
    }

    .verb-card, [class*="-card"] {
        background: transparent !important;
        border: none !important;
        border-bottom: 1px dashed #aaaaaa !important; /* Light line separator */
        border-radius: 0 !important;
        box-shadow: none !important;
        padding: 12px 0 !important;
        margin-bottom: 12px !important;
        page-break-inside: avoid; /* Keeps exercises from breaking in half across pages */
        break-inside: avoid;
    }

    /* 4. Display Hints (Tooltips) Inline */
    .dictionary-hint {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        background: transparent !important;
        color: #555555 !important;
        box-shadow: none !important;
        border: none !important;
        transform: none !important;
        font-size: 0.85rem !important;
        display: inline-block !important;
        margin-left: 6px !important;
    }

        .dictionary-hint::before {
            content: "(";
        }

        .dictionary-hint::after {
            content: ")";
        }

    /* 5. Transform Text Inputs into Blank Underlines ("Create" mode) */
    .input-wrapper {
        margin-top: 8px !important;
        display: block !important;
    }

    .practice-input {
        background: transparent !important;
        border: none !important;
        border-bottom: 1.5px solid #000000 !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        width: 300px !important;
        padding: 0 0 2px 0 !important;
    }

        .practice-input::placeholder {
            color: transparent !important; /* Hide input placeholders when printing */
        }

    /* 6. Transform Dropdowns into Blank Underlines ("Determine" mode) */
    .dropdown-group {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 15px !important;
        margin-top: 8px !important;
    }

    .gram-select {
        appearance: none !important;
        -webkit-appearance: none !important;
        background: transparent !important;
        border: none !important;
        border-bottom: 1.5px solid #000000 !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        width: 110px !important;
        color: transparent !important; /* Hide selected values for print */
    }

    /* 7. Grammar Badges formatting */
    .grammar-badge {
        border: 1px solid #777777 !important;
        color: #000000 !important;
        background: transparent !important;
    }
}