style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

.theme-pink { --main-color: #e91e63; --main-color-rgb: 233, 30, 99; --hover-bg: #fff0f5; }
.theme-green { --main-color: #28a745; --main-color-rgb: 40, 167, 69; --hover-bg: #f0fff0; }

body { 
    font-family: 'Poppins', sans-serif; 
    margin: 0; 
    transition: 0.3s; 
    background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('images/bg-graph.jpg');
    background-size: cover; 
    background-position: center; 
    background-attachment: fixed; 
    background-repeat: no-repeat; 
}

.hero h1 {
    color: #ffffff;
    font-size: 3.2rem; 
    font-weight: 700;
    letter-spacing: 6px; 
    text-transform: uppercase;
    margin-bottom: 35px;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5),
                 0 0 20px var(--main-color),
                 0 0 40px var(--main-color);
}

header { 
    background: #000; 
    color: #fff; 
    padding: 15px 5%; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    flex-wrap: wrap; 
    gap: 15px; 
}
.logo { 
    font-weight: bold; 
    font-size: 26px; 
    cursor: pointer; 
    user-select: none; 
}
.logo span { 
    color: var(--main-color); 
}
.hero { 
    text-align: center; 
    padding: 50px 20px; 
}

.btn-login-top, .btn-reg-top {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px); 
    -webkit-backdrop-filter: blur(5px);
    color: #fff; 
    padding: 10px 25px;
    border-radius: 30px; 
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 1.5px; 
    text-transform: uppercase; 
    cursor: pointer;
    position: relative;
    overflow: hidden; 
    z-index: 1;
    box-sizing: border-box;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.btn-login-top {
    border: 2px solid rgba(233, 30, 99, 0.6); 
    margin-right: 15px; 
}
.btn-reg-top {
    border: 2px solid rgba(0, 229, 255, 0.6); 
}
.btn-login-top::before, .btn-reg-top::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.15), transparent);
    transform: skewX(-25deg);
    transition: 0.5s ease;
    z-index: -1;
}
.btn-login-top:hover {
    background: rgba(233, 30, 99, 0.25); 
    border-color: rgba(233, 30, 99, 1); 
    box-shadow: 0 0 15px rgba(233, 30, 99, 0.7);
    transform: translateY(-2px); 
}
.btn-reg-top:hover {
    background: rgba(0, 229, 255, 0.25); 
    border-color: rgba(0, 229, 255, 1); 
    box-shadow: 0 0 15px rgba(0, 229, 255, 0.7); 
    transform: translateY(-2px); 
}
.btn-login-top:hover::before, .btn-reg-top:hover::before { 
    left: 150%; 
}
.btn-login-top:active, .btn-reg-top:active { 
    transform: translateY(1px) scale(0.98); 
}
.btn-logout-top {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px); 
    -webkit-backdrop-filter: blur(5px);
    color: #fff; 
    padding: 10px 25px;
    border-radius: 30px; 
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 1.5px; 
    text-transform: uppercase; 
    cursor: pointer;
    position: relative;
    overflow: hidden; 
    z-index: 1;
    box-sizing: border-box;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid rgba(255, 77, 77, 0.6);
}
.btn-logout-top::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.15), transparent);
    transform: skewX(-25deg);
    transition: 0.5s ease;
    z-index: -1;
}
.btn-logout-top:hover {
    background: rgba(255, 77, 77, 0.25); 
    border-color: rgba(255, 77, 77, 1); 
    box-shadow: 0 0 15px rgba(255, 77, 77, 0.7); 
    transform: translateY(-2px); 
}
.btn-logout-top:hover::before { left: 150%; }
.btn-logout-top:active { transform: translateY(1px) scale(0.98); }

.search-container { 
    display: flex; 
    align-items: center;
    justify-content: space-between; 
    max-width: 600px; 
    margin: 0 auto; 
    background: rgba(20, 20, 30, 0.65); 
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px; 
    padding: 6px 6px 6px 25px; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.3); 
}
.search-container:focus-within {
    border-color: rgba(var(--main-color-rgb), 0.6); 
    box-shadow: 0 0 15px rgba(var(--main-color-rgb), 0.3);
}
.search-container input { 
    flex: 1; 
    border: none; 
    background: transparent; 
    color: #fff; 
    outline: none; 
    font-family: 'Poppins', sans-serif;
    font-size: 15px; 
}
.search-container input::placeholder { color: rgba(255, 255, 255, 0.5); }
.search-container button { 
    padding: 12px 30px; 
    border: none; 
    background: var(--main-color); 
    color: white; 
    border-radius: 40px;
    cursor: pointer; 
    font-weight: bold; 
    font-family: 'Poppins', sans-serif;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap; 
    transition: 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}
.search-container button::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: skewX(-25deg);
    transition: 0.5s ease;
    z-index: -1;
}
.search-container button:hover {
    box-shadow: 0 0 15px var(--main-color);
    transform: scale(1.02);
}
.search-container button:hover::before { left: 150%; }
.search-container button:active { transform: scale(0.98); }

.algo-grid { 
    display: flex; 
    flex-wrap: wrap; 
    justify-content: center; 
    gap: 25px; 
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 20px; 
}

.card { 
    background: rgba(20, 20, 30, 0.65); 
    backdrop-filter: blur(12px); 
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1); 
    color: #fff; 
    width: 200px;  
    height: 180px; 
    display: flex; 
    flex-direction: column;
    align-items: center; 
    justify-content: center; 
    font-size: 13px; 
    font-weight: 600;
    letter-spacing: 1px; 
    text-transform: uppercase; 
    cursor: pointer; 
    border-radius: 16px;
    box-sizing: border-box;
    position: relative; 
    overflow: hidden; 
    z-index: 1;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.card.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none; 
    position: absolute;
    visibility: hidden;
}

.card img { 
    width: 80px;   
    height: 80px;  
    object-fit: contain; 
    margin-bottom: 12px; 
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.2)); 
    transition: transform 0.4s ease;
}
.card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.15), transparent);
    transform: skewX(-25deg); 
    transition: 0.5s;
    z-index: -1;
}
.card:hover::before { left: 150%; }
.card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0; 
    transition: opacity 0.4s ease;
    z-index: -2;
}
.card:hover::after { opacity: 1; }

.card:hover { 
    transform: translateY(-12px) scale(1.03); 
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 10px 30px -10px var(--glow-color), 
                inset 0 0 15px -8px var(--glow-color);
    border-bottom: 4px solid var(--glow-color); 
}
.card:hover img { transform: scale(1.15); }

.card-prim { --glow-color: #e040fb; }
.card-dfs { --glow-color: #ff9800; }
.card-ford { --glow-color: #00e5ff; }
.card-dijkstra { --glow-color: #ff1744; }
.card-kruskal { --glow-color: #00e676; }

.auth-overlay { 
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000; 
}

.auth-box { 
    max-width: 420px; 
    width: 90%; 
    margin: 10vh auto; 
    background: rgba(20, 20, 30, 0.65); 
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15); 
    box-shadow: 0 15px 35px rgba(0,0,0,0.6), 0 0 20px rgba(var(--main-color-rgb), 0.2);
    padding: 40px 30px; 
    border-radius: 16px; 
    text-align: center; 
    box-sizing: border-box; 
    color: #fff;
    animation: fadeIn 0.4s ease;
}

#auth-title {
    color: var(--main-color);
    margin-top: 0;
    margin-bottom: 25px;
    letter-spacing: 3px;
    text-shadow: 0 0 15px var(--main-color); 
    font-size: 28px;
    text-transform: uppercase;
}

.auth-box input { 
    width: 100%; 
    background: rgba(0, 0, 0, 0.4); 
    border: 1px solid rgba(255, 255, 255, 0.2); 
    color: white; 
    padding: 14px; 
    margin: 10px 0 15px; 
    border-radius: 8px; 
    font-family: 'Poppins', sans-serif; 
    outline: none; 
    box-sizing: border-box; 
    transition: 0.3s; 
    font-size: 14px;
}

.auth-box input::placeholder { color: rgba(255, 255, 255, 0.5); }

.auth-box input:focus { 
    border-color: var(--main-color); 
    box-shadow: 0 0 10px rgba(var(--main-color-rgb), 0.3);
}

.auth-box hr { 
    border: none; 
    height: 1px; 
    background: rgba(255, 255, 255, 0.1); 
    margin: 25px 0; 
}

.error-text { 
    color: #ff4d4d; 
    font-size: 13px; 
    display: none; 
    margin-bottom: 15px; 
    text-shadow: 0 0 5px rgba(255, 77, 77, 0.5);
}

.btn-action-main { 
    width: 100%; 
    padding: 14px; 
    background: linear-gradient(135deg, var(--main-color), #000);
    border: 1px solid var(--main-color); 
    color: white; 
    font-family: 'Poppins', sans-serif;
    font-weight: bold; 
    letter-spacing: 2px;
    border-radius: 8px; 
    cursor: pointer; 
    transition: 0.3s; 
    margin-bottom: 10px;
    text-transform: uppercase;
}

.btn-action-main:hover { 
    box-shadow: 0 0 20px var(--main-color); 
    transform: translateY(-2px);
}

.btn-action-sub {
    background: transparent; 
    border: 1px solid rgba(255, 255, 255, 0.2); 
    color: #ccc; 
    width: 100%; 
    padding: 14px; 
    cursor: pointer; 
    border-radius: 8px; 
    font-family: 'Poppins', sans-serif; 
    text-transform: uppercase; 
    font-weight: 600; 
    letter-spacing: 1px; 
    transition: 0.3s; 
    margin-top: 5px;
}

.btn-action-sub:hover { 
    background: rgba(255, 255, 255, 0.1); 
    color: white; 
    border-color: white; 
    transform: translateY(-2px);
}

.btn-close-text { 
    margin-top: 20px; 
    background: none; 
    border: none; 
    color: rgba(255, 255, 255, 0.5); 
    cursor: pointer; 
    font-family: 'Poppins', sans-serif;
    font-size: 13px;
    text-decoration: underline;
    transition: 0.3s;
}

.btn-close-text:hover { 
    color: var(--main-color); 
}

#algo-workspace {
    max-width: 1100px;
    margin: 20px auto; 
    padding: 20px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(10px); 
    } to { 
        opacity: 1; 
        transform: translateY(0); 
    } 
}

.workspace-header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.workspace-header h2 {
    color: white;
    font-size: 2rem;
    letter-spacing: 3px;
    margin: 0 0 0 20px;
    text-shadow: 0 0 15px var(--main-color);
}

.btn-back {
    background: transparent;
    color: var(--main-color);
    border: 1px solid var(--main-color);
    padding: 10px 20px;
    border-radius: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.btn-back:hover {
    background: var(--main-color);
    color: white;
    box-shadow: 0 0 15px var(--main-color);
}

.workspace-layout {
    display: grid;
    grid-template-columns: 350px 1fr; 
    gap: 30px
}
.right-panel {
    display: flex;
    flex-direction: column;
    gap: 20px; 
}

.glass-panel {
    background: rgba(20, 20, 30, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 20px;
    box-sizing: border-box;
    color: white;
}
.panel-title {
    margin-top: 0;
    color: var(--main-color);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 10px;
    letter-spacing: 2px;
    font-size: 16px;
}
.divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 25px 0;
}

.glass-panel h3 {
    margin-top: 0;
    color: var(--main-color);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 10px;
    letter-spacing: 2px;
    font-size: 16px;
}

.map-panel {
    flex: 2; 
    display: flex;
    flex-direction: column;
    min-height: 350px;
}

.map-container {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border: 1px dashed rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.execution-panel {
    flex: 1; 
    display: flex;
    flex-direction: column;
    min-height: 200px;
}

.execution-log {
    flex: 1;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    color: #00e676; 
    overflow-y: auto; 
    line-height: 1.6;
}

.log-step { 
    margin-bottom: 8px; 
    border-bottom: 1px solid rgba(255,255,255,0.05); 
    padding-bottom: 5px; 
}
.log-step span { 
    color: #fff; opacity: 0.7; 
}

.input-group { 
    margin-bottom: 15px; 
}
.input-group label { 
    display: block; 
    margin-bottom: 5px; 
    font-size: 13px; 
    color: #aaa; 
}
.input-group input, .input-group textarea {
    width: 100%; background: rgba(0, 0, 0, 0.4); 
    border: 1px solid rgba(255,255,255,0.2);
    color: white; 
    padding: 10px; 
    border-radius: 8px; 
    font-family: 'Poppins', sans-serif;
    outline: none; 
    box-sizing: border-box; 
    transition: 0.3s;
}
.input-group textarea { 
    height: 100px; 
    resize: vertical; 
}
.input-group input:focus, .input-group textarea:focus { 
    border-color: var(--main-color); 
    box-shadow: 0 0 10px rgba(var(--main-color-rgb), 0.3); 
}
.user-greeting {
    color: white;
    margin-right: 20px;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 0 0 10px var(--main-color);
    background: transparent !important; 
    border: none !important;
    box-shadow: none !important; 
    outline: none !important;
    padding: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-mock-run {
    width: 100%; 
    padding: 12px; 
    background: linear-gradient(135deg, var(--main-color), #000);
    border: 1px solid var(--main-color); color: white; 
    font-weight: bold; letter-spacing: 2px;
    border-radius: 8px; 
    cursor: pointer; 
    transition: 0.3s; margin-top: 10px;
}
.btn-mock-run:hover { 
    box-shadow: 0 0 20px var(--main-color); 
}

@media (max-width: 900px) {
    .workspace-layout {
        grid-template-columns: 1fr; 
    }
}

@media (max-width: 650px) {
    header { 
        flex-direction: column; 
        justify-content: center; 
        text-align: center; 
    }
    nav { 
        margin-top: 10px; 
    }
    .card {
        width: 100%; 
        max-width: 320px; } 
    .hero h1 { 
        font-size: 2rem;
        letter-spacing: 3px; 
    }
}