body {
            margin: 0;
            overflow: hidden;
            background-color: #050003;
            font-family: 'Montserrat', sans-serif;
            color: white;
            touch-action: none;
        }

        #boot-wrapper {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: #0a0205;
            z-index: 999;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: opacity 0.5s ease-in-out;
        }

        #terminal-window {
            width: 90%;
            max-width: 650px;
            background-color: rgba(15, 5, 10, 0.95);
            border: 1px solid #ff66b2;
            border-radius: 8px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8), inset 0 0 15px rgba(255, 102, 178, 0.15);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            backdrop-filter: blur(5px);
        }

        #terminal-header {
            background: linear-gradient(to bottom, #3a2530, #2b1a23);
            border-bottom: 1px solid #22111a;
            padding: 8px 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: #dfdfdf;
            font-family: 'Ubuntu Mono', 'Courier New', monospace;
            font-size: 14px;
        }

        .term-title {
            font-weight: bold;
            color: #ff66b2;
        }

        .linux-controls {
            display: flex;
            gap: 8px;
        }

        .l-btn {
            width: 18px;
            height: 18px;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 50%;
            font-size: 11px;
            color: #aaa;
            cursor: pointer;
            transition: 0.2s;
        }

        .l-btn:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        .l-btn.close:hover {
            background: #e81123;
            color: white;
        }

        #boot-screen {
            color: #ff66b2;
            font-family: 'Courier New', Courier, monospace;
            font-size: 15px;
            padding: 20px;
            box-sizing: border-box;
            text-shadow: 0 0 5px #ff66b2;
            min-height: 250px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        #progress-container {
            width: calc(100% - 40px);
            margin: 0 20px 20px 20px;
            height: 12px;
            border: 1px solid #ff66b2;
            box-sizing: border-box;
            position: relative;
            background: rgba(255, 102, 178, 0.1);
        }

        #progress-bar {
            height: 100%;
            width: 0%;
            background-color: #ff66b2;
            box-shadow: 0 0 10px #ff66b2;
            transition: width 0.3s ease-out;
        }

        .boot-line {
            margin: 4px 0;
            opacity: 1;
        }

        .cursor {
            display: inline-block;
            width: 8px;
            height: 15px;
            background-color: #ff66b2;
            animation: blink 1s step-end infinite;
            vertical-align: bottom;
            margin-left: 2px;
        }

        @keyframes blink {

            0%,
            100% {
                opacity: 1;
            }

            50% {
                opacity: 0;
            }
        }

        #loading-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: #000;
            z-index: 998;
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            transition: opacity 0.5s ease-in-out;
            opacity: 0;
        }

        #loading-logo {
            font-family: 'Montserrat', sans-serif;
            font-size: 2.5rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 40px;
            text-shadow: 0 0 10px rgba(255, 102, 178, 0.8);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .center-letter {
            margin: 0 3px;
        }

        .side-container {
            overflow: hidden;
            display: flex;
            width: 0;
            opacity: 0;
            white-space: nowrap;
            animation: revealLogo 1.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
            animation-delay: 0.3s;
        }

        .side-container.left {
            justify-content: flex-end;
            letter-spacing: 6px;
        }

        .side-container.right {
            justify-content: flex-start;
            letter-spacing: 6px;
        }

        @keyframes revealLogo {
            0% {
                width: 0;
                opacity: 0;
            }

            100% {
                width: 140px;
                opacity: 1;
            }
        }

        .spinner {
            width: 45px;
            height: 45px;
            border: 4px solid rgba(255, 102, 178, 0.1);
            border-top: 4px solid #ff66b2;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            box-shadow: 0 0 15px rgba(255, 102, 178, 0.5);
        }

        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }

            100% {
                transform: rotate(360deg);
            }
        }

        #intro-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            background: #000000;
            z-index: 100;
            transition: opacity 1.5s ease-in-out;
            perspective: 1000px;
            overflow: hidden;
            opacity: 0;
            pointer-events: none;
        }

        .falling-particle {
            position: absolute;
            font-size: 28px;
            top: -50px;
            cursor: grab;
            user-select: none;
            animation: fallDown linear infinite;
            z-index: 5;
            filter: drop-shadow(0 0 8px rgba(255, 105, 180, 0.8));
            transition: transform 0.2s;
        }

        .falling-particle:active {
            cursor: grabbing;
            transform: scale(1.5);
            filter: drop-shadow(0 0 15px rgba(255, 255, 255, 1));
        }

        @keyframes fallDown {
            0% {
                transform: translateY(0) rotate(0deg);
                opacity: 0;
            }

            10% {
                opacity: 1;
            }

            90% {
                opacity: 1;
            }

            100% {
                transform: translateY(110vh) rotate(360deg);
                opacity: 0;
            }
        }

        .envelope-wrapper {
            position: relative;
            z-index: 10;
            width: 320px;
            height: 220px;
            transition: transform 0.3s;
        }

        .envelope {
            width: 100%;
            height: 100%;
            background: #e6005c;
            position: absolute;
            cursor: pointer;
            box-shadow: 0 15px 50px rgba(255, 0, 102, 0.5);
            border-radius: 8px;
            transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            transform-style: preserve-3d;
        }

        .envelope:hover {
            transform: scale(1.08) translateY(-10px);
        }

        .envelope-front {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 0;
            border-left: 160px solid #ff3385;
            border-right: 160px solid #ff3385;
            border-bottom: 120px solid #cc0052;
            border-top: 100px solid transparent;
            z-index: 3;
            border-radius: 0 0 8px 8px;
            pointer-events: none;
        }

        .envelope-flap {
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 0;
            border-left: 160px solid transparent;
            border-right: 160px solid transparent;
            border-top: 125px solid #ff1a75;
            transform-origin: top;
            transition: transform 0.5s ease-in-out, z-index 0.5s;
            z-index: 4;
            filter: drop-shadow(0 4px 4px rgba(0, 0, 0, 0.2));
        }

        .envelope:hover .envelope-flap {
            transform: rotateX(180deg);
            z-index: 2;
        }

        .envelope-text {
            position: absolute;
            top: -60px;
            width: 100%;
            text-align: center;
            font-family: 'Playfair Display', serif;
            font-weight: 700;
            font-style: italic;
            font-size: 1.6rem;
            color: #ff99c2;
            letter-spacing: 2px;
            text-transform: none;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
            animation: pulseGlow 2s ease-in-out infinite;
            z-index: 5;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .envelope-wrapper:hover .envelope-text {
            opacity: 0 !important;
            animation: none;
        }

        @keyframes pulseGlow {

            0%,
            100% {
                transform: translateY(0) scale(1);
                opacity: 0.8;
            }

            50% {
                transform: translateY(-10px) scale(1.05);
                opacity: 1;
            }
        }

        #canvas-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 10;
            opacity: 0;
            transition: opacity 2s ease-in-out;
        }

        #birthday-text {
            position: absolute;
            bottom: 12%;
            left: 50%;
            transform: translateX(-50%);
            font-family: 'Playfair Display', serif;
            font-size: 3.2rem;
            font-weight: 900;
            font-style: italic;
            color: #ffffff;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.8), 0 0 15px rgba(255, 102, 178, 0.6);
            z-index: 20;
            white-space: nowrap;
            opacity: 1;
            transition: opacity 1.5s ease-in-out, transform 1.5s;
            pointer-events: none;
            letter-spacing: 2px;
            text-align: center;
        }

        #note-modal {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.5);
            background: rgba(20, 2, 10, 0.95);
            border: 1px solid rgba(255, 105, 180, 0.5);
            padding: 25px;
            border-radius: 20px;
            z-index: 200;
            text-align: center;
            width: auto;
            min-width: 320px;
            max-width: 90vw;
            max-height: 90vh;
            overflow-y: auto;
            box-sizing: border-box;
            box-shadow: 0 0 80px rgba(255, 0, 102, 0.6), inset 0 0 30px rgba(255, 105, 180, 0.3);
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        #note-modal.active {
            transform: translate(-50%, -50%) scale(1);
            opacity: 1;
            pointer-events: auto;
        }

        #modal-img {
            width: 100%;
            height: auto;
            max-height: 55vh;
            object-fit: contain;
            border-radius: 12px;
            margin-bottom: 20px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
            border: 2px solid #ff66b2;
        }

        #modal-text {
            font-size: 1.1rem;
            font-weight: 400;
            line-height: 1.6;
            margin-bottom: 25px;
            color: #ffc2d9;
        }

        .close-btn {
            background: linear-gradient(135deg, #e6005c, #ff3385);
            color: white;
            border: none;
            padding: 12px 35px;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            font-family: 'Montserrat', sans-serif;
            font-size: 1.05rem;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            box-shadow: 0 5px 20px rgba(255, 0, 102, 0.5);
        }

        .close-btn:hover {
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 8px 30px rgba(255, 0, 102, 0.8);
            background: linear-gradient(135deg, #ff3385, #ff66b2);
        }

        #hidden-modal {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.5);
            background: rgba(15, 5, 10, 0.95);
            border: 1px solid #ff66b2;
            padding: 20px;
            border-radius: 10px;
            z-index: 9999;
            width: 350px;
            box-shadow: 0 0 30px rgba(255, 102, 178, 0.4);
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            box-sizing: border-box;
        }

        #hidden-modal.active {
            transform: translate(-50%, -50%) scale(1);
            opacity: 1;
            pointer-events: auto;
        }

        #hidden-modal h3 {
            margin: 0 0 15px 0;
            color: #ff99c2;
            font-family: 'Courier New', Courier, monospace;
            font-size: 16px;
            text-align: center;
        }

        #hidden-input {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid #ff66b2;
            color: #fff;
            padding: 10px;
            box-sizing: border-box;
            border-radius: 5px;
            font-family: 'Montserrat', sans-serif;
            resize: none;
            outline: none;
        }

        .h-btn {
            background: #ff3385;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            font-family: 'Montserrat', sans-serif;
            font-size: 12px;
            transition: 0.2s;
        }

        .h-btn:hover {
            background: #ff66b2;
        }

        .h-btn.close {
            background: #333;
            border: 1px solid #555;
        }

        .h-btn.close:hover {
            background: #555;
        }

        #sender-signature {
            position: absolute;
            bottom: 20px;
            right: 30px;
            font-family: 'Dancing Script', cursive;
            font-size: 1.8rem;
            color: #ff99c2;
            z-index: 50;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), 0 0 10px rgba(255, 0, 102, 0.6);
            pointer-events: none;
            opacity: 0;
            transition: opacity 2s ease-in-out;
        }

        #toast-notification {
            position: fixed;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%) translateY(80px);
            background: rgba(20, 2, 10, 0.95);
            border: 1px solid #ff66b2;
            color: #ffc2d9;
            padding: 14px 30px;
            border-radius: 12px;
            font-family: 'Montserrat', sans-serif;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            z-index: 99999;
            box-shadow: 0 8px 32px rgba(255, 0, 102, 0.5), inset 0 0 20px rgba(255, 105, 180, 0.15);
            opacity: 0;
            pointer-events: none;
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        #toast-notification.show {
            transform: translateX(-50%) translateY(0);
            opacity: 1;
        }

        #toast-notification .toast-icon {
            display: inline-flex;
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, #e6005c, #ff3385);
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            box-shadow: 0 0 10px rgba(255, 0, 102, 0.6);
        }

        @media screen and (max-width: 600px) {
            .envelope-wrapper {
                transform: scale(0.85);
            }

            #birthday-text {
                font-size: 2.2rem;
                bottom: 15%;
                white-space: normal;
                padding: 0 15px;
            }

            #note-modal {
                padding: 15px;
                min-width: 280px;
            }

            #modal-img {
                max-height: 45vh;
            }

            .envelope-text {
                font-size: 1.4rem;
                top: -50px;
            }

            .falling-particle {
                font-size: 20px;
            }

            #hidden-modal {
                width: 90%;
            }

            #toast-notification {
                font-size: 0.85rem;
                padding: 12px 22px;
                bottom: 30px;
            }
        }