@import url('https://fonts.googleapis.com/css2?family=Roboto+Condensed:ital,wght@0,100..900;1,100..900&family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600;700&display=swap');

:root {
    --purple: #9216a8;
    --grey: #2b2b2d;
    --white: #fff;
    --black: #0e101c;
    --light-grey: #ffffff4d;
    --card-bg: #1a1a1c;
    --button-bg: #2c2c2c;
    --code-bg: #0d0d0d;
    --inline-code-bg: rgba(45, 45, 45, 0.7);
    --dashed-bg: #111;
    --text-subtle: #c0c0c0;
    --border-color: #333;
    --border-dark: #222;
    --border-medium: #444;
    --border-light-dashed: #555;
    --easy: #17b32c;
    --medium: #cbce1e;
    --hard: #d7650e;
    --expert: #ff0000;
    --shadow-xlight: rgba(0,0,0,0.3);
    --shadow-light: rgba(0, 0, 0, 0.4);
    --shadow-medium: rgba(0, 0, 0, 0.5);
    --shadow-heavy: rgba(0, 0, 0, 0.7);
    --completed-color: #48ff00;
    --subtle-green: rgba(23, 179, 44, 0.2);
    --dark-green-bg: rgba(10, 80, 20, 0.8);
    --darkest-green-bg: rgba(10, 30, 15, 0.95);
    --podium-gold: #FFD700;
    --podium-silver: #C0C0C0;
    --podium-bronze: #CD7F32;
    --podium-bg-dark: #1a1a2e;
    --podium-bg-light: #2a2a3e;
    --podium-glow-strength: 15px;
}

* {
    font-family: "Roboto Condensed";
    text-decoration: none;
    outline: none;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::selection {
    background-color: var(--grey);
    color: var(--white);
}

html {
    font-size: 100%;
}

body {
    min-height: 100vh;
    font-size: 100%;
    background: var(--grey) url('../images/back.webp') no-repeat center top / cover;
    color: var(--white);
    display: flex;
    flex-direction: column;
}

main {
    flex-grow: 1;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: 100%;
}

h2 {
    position: relative;
    font-size: 3rem;
    font-style: italic;
    text-transform: uppercase;
    color: var(--white);
}

.difficulty-tag {
    margin-left: 0.5rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 15px;
    color: var(--white);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.4);
    flex-shrink: 0;
}
.difficulty-easy { background-color: var(--easy); box-shadow: 0 0 8px var(--easy); }
.difficulty-medium { background-color: var(--medium); box-shadow: 0 0 8px var(--medium); }
.difficulty-hard { background-color: var(--hard); box-shadow: 0 0 8px var(--hard); }
.difficulty-expert { background-color: var(--expert); box-shadow: 0 0 8px var(--expert); }

.modal-container {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 1001;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-container.is-visible {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    pointer-events: auto;
    border: 1px solid var(--easy);
    border-radius: 12px;
    padding: 0.5rem;
    width: 90%;
    max-width: 300px;
    position: relative;
    box-shadow: 0 10px 30px var(--shadow-heavy);
    text-align: center;
    transform: scale(0.85);
    margin-bottom: 20px;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}
.modal-container.is-visible .modal-content {
    transform: scale(1);
}
.close-button {
    position: absolute;
    top: 5px;
    right: 8px;
    color: var(--easy);
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
}
.close-button:hover {
    color: var(--white);
}
.modal-body {
    padding-bottom: 0;
}
#modal-title {
    font-size: 1rem;
    font-weight: bold;
    color: var(--easy);
    margin-bottom: 0.5rem;
}
#modal-message {
    font-size: 0.75rem;
    color: var(--easy);
    padding-bottom: 0;
    line-height: 1.4;
}
.modal-success .modal-content { 
    border-color: var(--easy); 
    background-color: var(--darkest-green-bg); 
}
.modal-success #modal-title, 
.modal-success .close-button, 
.modal-success #modal-message { 
    color: var(--easy); 
}
.modal-error .modal-content { 
    border-color: var(--expert); 
    background-color: rgba(30, 0, 0, 0.95); 
}
.modal-error #modal-title, 
.modal-error .close-button, 
.modal-error #modal-message { 
    color: var(--expert); 
}

pre::-webkit-scrollbar {
    height: 8px;
    background-color: rgba(0, 0, 0, 0.2);
}
pre::-webkit-scrollbar-thumb {
    background-color: var(--purple, #9216a8);
    border-radius: 10px;
    border: 2px solid var(--code-bg, #1e1e2e);
}
.back-button {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}
.btn-glass {
    padding: 0.85rem 1.25rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background-color: rgba(35, 38, 49, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}
.btn-glass .fas {
    color: var(--purple);
    transition: color 0.3s ease;
}
.btn-glass.validated {
    background-color: var(--easy);
    border-color: var(--easy);
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    cursor: default;
}
.btn-glass.validated .fas {
    color: white;
    margin-left: 0.5em;
}
@media (hover: hover) and (pointer: fine) {
    .btn-glass:not(.validated):hover {
        background-color: rgba(146, 22, 168, 0.8);
        border-color: rgba(255, 255, 255, 0.2);
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(146, 22, 168, 0.4);
    }
    .btn-glass:not(.validated):hover .fas {
        color: white;
    }
}
.construction {
    padding-top: 5rem;
    text-align: center;
}
@media (max-width: 900px) {
    html { font-size: 55%; }
    .btn-glass { font-size: 1.5rem; }
}