@import url('https://fonts.googleapis.com/css2?family=Architects+Daughter&family=Montserrat:wght@900&family=Space+Grotesk:wght@700&family=Gochi+Hand&display=swap');

:root {
    --bg-main: #ffffff;
    --paper: #ffffff;
    --accent: #fe0071;
    /* Hot Pink */
    --accent-dark: #cc005a;
    --ink: #000000;
    --grid: rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-main);
    background-image:
        linear-gradient(var(--grid) 2px, transparent 2px),
        linear-gradient(90deg, var(--grid) 2px, transparent 2px);
    background-size: 40px 40px;
    color: var(--ink);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    padding: 1rem;
}

.container {
    width: 100%;
    max-width: 900px;
    padding: 3rem;
    background: var(--paper);
    border: 4px solid var(--ink);
    box-shadow: 12px 12px 0px var(--ink);
    border-radius: 0px;
    position: relative;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}



h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 4rem;
    text-transform: uppercase;
    margin-bottom: 2rem;
    color: var(--ink);
    letter-spacing: -2px;
    line-height: 0.9;
    z-index: 2;
    position: relative;
}

/* Highlight effect on title */
h1::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100%;
    height: 30px;
    background: var(--accent);
    z-index: -1;
    transform: rotate(-1deg);
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 3.5rem;
    font-weight: 700;
    text-transform: uppercase;
    background: var(--ink);
    color: #fff;
    display: inline-block;
    padding: 5px 15px;
    transform: rotate(1deg);
    z-index: 2;
    align-self: flex-start;
}

/* List Items (Courses/Chapters) */
.list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    width: 100%;
    z-index: 2;
}

.item-card {
    background: var(--paper);
    border: 4px solid var(--ink);
    padding: 2rem;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    color: var(--ink);
    font-weight: 900;
    font-size: 1.5rem;
    font-family: 'Space Grotesk', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 6px 6px 0px var(--ink);
    text-transform: uppercase;
}

.item-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: 10px 10px 0px var(--ink);
    background: var(--accent);
    color: white;
}

.item-card:nth-child(even):hover {
    background: var(--accent);
    color: white;
}

/* Flashcard Styles */
.flashcard-container {
    perspective: 1000px;
    width: 100%;
    max-width: 650px;
    height: 400px;
    margin: 2rem auto;
    cursor: pointer;
    z-index: 2;
}

.flashcard {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    transform-style: preserve-3d;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    background: #fff;
    border: 4px solid var(--ink);
    box-shadow: 8px 8px 0px var(--ink);
    font-size: 2.2rem;
    line-height: 1.1;
    font-family: 'Gochi Hand', cursive;
    text-align: center;
}

.flashcard-front {
    background: #fff;
}

.flashcard-back {
    transform: rotateY(180deg);
    background-color: var(--accent);
    color: white;
}

/* Navigation Utilities */
.back-btn {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 800;
    z-index: 10;
    background: var(--ink);
    padding: 5px 10px;
    border: 3px solid var(--ink);
    box-shadow: 4px 4px 0px var(--accent);
}

.back-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--ink);
}

.controls {
    margin-top: auto;
    padding-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    z-index: 2;
}

.nav-btn {
    background: var(--ink);
    border: none;
    color: #fff;
    padding: 1rem 2rem;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.2rem;
    text-transform: uppercase;
    transition: all 0.1s;
    box-shadow: 6px 6px 0px var(--accent);
}

.nav-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--accent);
}

.counter {
    color: var(--ink);
    font-size: 1.8rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 900;
}

/* Handwritten Doodle Elements */
.container::after {
    content: '★';
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    font-size: 3rem;
    color: var(--accent);
    font-family: 'Gochi Hand', cursive;
    transform: rotate(15deg);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Lang Toggle Specifics */
#lang-toggle {
    background: var(--accent);
    color: white;
    box-shadow: 4px 4px 0px var(--ink);
}

#lang-toggle:hover {
    background: var(--accent-dark);
}

/* Responsive */
@media (max-width: 640px) {
    body {
        padding: 0.5rem;
    }

    .container {
        padding: 1rem;
        padding-top: 4rem;
        min-height: 95vh;
        box-shadow: 8px 8px 0px var(--ink);
    }

    .container::before {
        display: none;
    }

    h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
        letter-spacing: -1px;
        word-break: break-word;
    }

    h1::after {
        height: 15px;
        bottom: -5px;
    }

    .subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .list {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .item-card {
        padding: 1.2rem;
        font-size: 1.2rem;
    }

    .flashcard-container {
        height: 380px;
        margin: 1rem auto;
    }

    .flashcard-face {
        font-size: 1.4rem;
        padding: 1.5rem;
        border-width: 3px;
    }

    .controls {
        gap: 0.5rem;
        padding-top: 1rem;
        flex-wrap: wrap;
    }

    .nav-btn {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
        box-shadow: 4px 4px 0px var(--accent);
    }

    .counter {
        font-size: 1.2rem;
        order: -1;
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .back-btn {
        top: 1rem;
        left: 1rem;
        font-size: 1rem;
    }
}

@media (max-width: 400px) {
    h1 {
        font-size: 1.8rem;
    }

    .flashcard-container {
        height: 320px;
    }

    .controls {
        gap: 0.3rem;
    }

    .nav-btn {
        padding: 0.5rem 0.6rem;
    }
}

/* Dark Mode Toggle */
.dark-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 2px solid var(--ink);
    background: var(--paper);
    cursor: pointer;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 3px 3px 0px var(--ink);
    z-index: 1000;
    transition: all 0.2s ease;
}

.dark-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 3px 5px 0px var(--ink);
}

@media (max-width: 640px) {
    .dark-toggle {
        width: 38px;
        height: 38px;
        font-size: 1.1rem;
        top: 1rem;
        right: 1rem;
        border-radius: 10px;
    }
}

/* Dark Mode Styles */
body.dark-mode {
    background-color: #0f0f0f;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 2px, transparent 2px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 2px, transparent 2px);
    background-size: 40px 40px;
}

body.dark-mode .container {
    background: #1a1a1a;
    border-color: var(--accent);
    box-shadow: 12px 12px 0px var(--accent);
}

body.dark-mode h1 {
    color: #fff;
}

body.dark-mode h1::after {
    background: var(--accent);
}

body.dark-mode .subtitle {
    color: #fff;
    background: var(--accent);
}

body.dark-mode .back-btn {
    background: var(--accent);
    color: #fff;
}

body.dark-mode .item-card {
    background: #252525;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

body.dark-mode .item-card:hover {
    background: var(--accent);
    border-color: var(--accent);
}

body.dark-mode .flashcard-front,
body.dark-mode .flashcard-back {
    background: #252525;
    color: #fff;
    border-color: var(--accent);
    box-shadow: 8px 8px 0px var(--accent);
}

body.dark-mode .nav-btn {
    background: #252525;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

body.dark-mode .nav-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

body.dark-mode .lang-btn {
    background: #252525;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

body.dark-mode .lang-btn.active {
    background: var(--accent);
    border-color: var(--accent);
}

body.dark-mode .counter {
    color: #fff;
}

body.dark-mode .dark-toggle {
    background: #252525;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 3px 3px 0px rgba(255, 255, 255, 0.2);
}

body.dark-mode .dark-toggle:hover {
    border-color: var(--accent);
}